zsh-default-git-completion

zsh $ git <Tab>
Completing alias
cmtmsg                          -- alias for 'show --no-patch --format=format:%B'
co                              -- alias for 'checkout'
dry-merge                       -- alias for '!f() { grep -Fqm 1 'changed in both' <<< $(git merge-tree $(git merge-base $1 $2) $2 $1) && echo 'Merge conflict detected' || echo 'M
edit                            -- alias for '!$EDITOR'
ffpull                          -- alias for 'pull --ff-only'
fgca                            -- alias for '!git gca && git xfsck'
gca                             -- alias for 'gc --aggressive'
glog                            -- alias for 'log --graph'
irb                             -- alias for 'rebase --interactive'
lsmergeconflicts  lsconflicted  -- alias for 'ls-files --unmerged'
mcdiff                          -- alias for 'diff --minimal --word-diff-regex=.'
mnsdiff                         -- alias for 'diff --minimal --word-diff'
mwdiff                          -- alias for 'diff --minimal --word-diff-regex='w+|S|.''
noffmerge                       -- alias for 'merge --no-ff'
pxl                             -- alias for 'log --decorate --source --format=fuller --encoding=UTF-8 --notes --show-signature --date=iso --graph --patch --stat'
s                               -- alias for 'status'
sl                              -- alias for 'log --decorate --source --format=short --encoding=UTF-8 --notes --show-signature --date=iso --graph'
vc                              -- alias for 'commit --verbose'
xfsck                           -- alias for 'fsck --full --strict --unreachable --dangling'
xl                              -- alias for 'log --decorate --source --format=fuller --encoding=UTF-8 --notes --show-signature --date=iso --graph'
Completing main porcelain command
add           -- add file contents to index
am            -- apply patches from a mailbox
archive       -- create archive of files from named tree
bisect        -- find, by binary search, change that introduced a bug
branch        -- list, create, or delete branches
bundle        -- move objects and refs by archive
checkout      -- checkout branch or paths to working tree
cherry-pick   -- apply changes introduced by some existing commits
citool        -- graphical alternative to git commit
clean         -- remove untracked files from working tree
clone         -- clone repository into new directory
commit        -- record changes to repository
describe      -- show most recent tag that is reachable from a commit
diff          -- show changes between commits, commit and working tree, etc.
fetch         -- download objects and refs from another repository
format-patch  -- prepare patches for e-mail submission
gc            -- cleanup unnecessary files and optimize local repository
grep          -- print lines matching a pattern
gui           -- run portable graphical interface to git
init          -- create empty git repository or re-initialize an existing one
log           -- show commit logs
merge         -- join two or more development histories together
mv            -- move or rename file, directory, or symlink
notes         -- add or inspect object notes
pull          -- fetch from and merge with another repository or local branch
push          -- update remote refs along with associated objects
rebase        -- forward-port local commits to the updated upstream head
reset         -- reset current HEAD to specified state
revert        -- revert existing commits
rm            -- remove files from the working tree and from the index
shortlog      -- summarize git log output
show          -- show various types of objects
stash         -- stash away changes to dirty working directory
status        -- show working-tree status
submodule     -- initialize, update, or inspect submodules
tag           -- create, list, delete or verify tag object signed with GPG
Completing ancillary manipulator command
config         -- get and set repository or global options
fast-export    -- data exporter
fast-import    -- import information into git directly
filter-branch  -- rewrite branches
mergetool      -- run merge conflict resolution tools to resolve merge conflicts
pack-refs      -- pack heads and tags for efficient repository access
prune          -- prune all unreachable objects from the object database
reflog         -- manage reflog information
relink         -- hardlink common objects in local repositories
remote         -- manage set of tracked repositories
repack         -- pack unpacked objects in a repository
replace        -- create, list, delete refs to replace objects
Completing ancillary interrogator command
blame              -- show what revision and author last modified each line of a file
cherry             -- find commits not merged upstream
count-objects      -- count unpacked objects and display their disk consumption
difftool           -- show changes using common diff tools
fsck               -- verify connectivity and validity of objects in database
get-tar-commit-id  -- extract commit ID from an archive created using git archive
help               -- display help information about git
instaweb           -- instantly browse your working repository in gitweb
merge-tree         -- show three-way merge without touching index
rerere             -- reuse recorded resolution of conflicted merges
rev-parse          -- pick out and massage parameters for other git commands
show-branch        -- show branches and their commits
verify-tag         -- check GPG signature of tags
whatchanged        -- show commit-logs and differences they introduce
Completing interaction command
archimport       -- import an Arch repository into git
cvsexportcommit  -- export a single commit to a CVS checkout
cvsimport        -- import a CVS "repository" into a git repository
cvsserver        -- run a CVS server emulator for git
imap-send        -- send a collection of patches to an IMAP folder
quiltimport      -- apply a quilt patchset
request-pull     -- generate summary of pending changes
send-email       -- send collection of patches as emails
svn              -- bidirectional operation between a Subversion repository and git
Completing plumbing manipulator command
apply           -- apply patch to files and/or to index
checkout-index  -- copy files from index to working directory
commit-tree     -- create new commit object
hash-object     -- compute object ID and optionally create a blob from a file
index-pack      -- build pack index file for an existing packed archive
merge-file      -- run a three-way file merge
merge-index     -- run merge for files needing merging
mktag           -- create tag object
mktree          -- build tree-object from git ls-tree formatted text
pack-objects    -- create packed archive of objects
prune-packed    -- remove extra objects that are already in pack files
read-tree       -- read tree information into directory index
symbolic-ref    -- read and modify symbolic references
unpack-objects  -- unpack objects from packed archive
update-index    -- register file contents in the working directory to the index
update-ref      -- update object name stored in a reference safely
write-tree      -- create tree from the current index
Completing plumbing interrogator command
cat-file        -- provide content or type information for repository objects
diff-files      -- compare files in working tree and index
diff-index      -- compare content and mode of blobs between index and repository
diff-tree       -- compare content and mode of blobs found via two tree objects
for-each-ref    -- output information on each ref
ls-files        -- information about files in index/working directory
ls-remote       -- show references in a remote repository
ls-tree         -- list contents of a tree object
merge-base      -- find as good a common ancestor as possible for a merge
name-rev        -- find symbolic names for given revisions
pack-redundant  -- find redundant pack files
rev-list        -- list commit object in reverse chronological order
show-index      -- show packed archive index
show-ref        -- list references in a local repository
unpack-file     -- create temporary file with blob's contents
var             -- show git logical variable
verify-pack     -- validate packed git archive files
Completing plumbing sync command
daemon              -- run a really simple server for git repositories
fetch-pack          -- receive missing objects from another repository
http-backend        -- run a server side implementation of Git over HTTP
send-pack           -- push objects over git protocol to another repository
update-server-info  -- update auxiliary information file to help dumb servers
Completing plumbing sync helper command
http-fetch      -- download from remote git repository via HTTP
http-push       -- push objects over HTTP/DAV to another repository
parse-remote    -- routines to help parsing remote repository access parameters
receive-pack    -- receive what is pushed into repository
shell           -- restricted login shell for GIT-only SSH access
upload-archive  -- send archive back to git-archive
upload-pack     -- send objects packed back to git fetch-pack
Completing plumbing internal helper command
check-attr        -- display gitattributes information
check-ignore      -- debug gitignore/exclude files
check-mailmap     -- show canonical names and email addresses of contacts
check-ref-format  -- ensure that a reference name is well formed
fmt-merge-msg     -- produce merge commit message
mailinfo          -- extract patch and authorship from a single email message
mailsplit         -- split mbox file into a list of files
merge-one-file    -- standard helper-program to use with git merge-index
patch-id          -- compute unique ID for a patch
stripspace        -- filter out empty lines