git

@ === HEAD
.git/ORIG_HEAD - save the last commit hash after merge

git branch BRANCH_NAME - create new branch
git branch BRANCH_NAME [COMMIT_HASH || EXIST_BRANCH] - create branch on commit with COMMIT_HASH or on exist branch
git branch -d BRANCH_NAME - delete branch
git branch -D BRANCH_NAME - delte branch(force)
git branch BRANCH_NAME COMMIT_HAST - reset deleted branch

git checkout COMMIT_HASH || BRANCH_NAME - checkout to this commit
git checkout -f HEAD - reset all changes in current branch
git checkout -B BRANCH_NAME COMMIT_HASH - switch branch to commit
git checkout COMMIT_HASH [PATH_TO_FILE] - update file to COMMIT_HASH state
git checkout PATH_TO_FILE === git checkout HEAD PATH_TO_FILE
git checkout -- PATH_TO_FILE - (--) implicitly  indicates that this is the path
git checkout - === git checkout @{-1} - checkout to previous branch

git stash - save changes and reset uncommited files
git stash pop - return saved changes

git log - print history of commits
git log --oneline - minimal version of git log
git log BRANH_NAME - print all commits in branch

git reflog === git log --oneline -g - show reference log for HEAD
git reflog --no-decorate - print reflog wihtout decorate data

git show COMMIT_HASH || BRANCH_NAME - print info about commit with diffs
git show --quiet - print only commit info without diffs
git show COMMIT_HASH:PATH_TO_FILE - show file in commit
git show COMMIT_HASH:/WORD_FROM_DESCRIPTION - show last commit with some description

git gc - garbage collector
git gc --prune=now - delte all unrachable commits

git tag TAG_NAME COMMIT_HASH - add tag to commit
git tag -n - show all tags with commit message
git tag -a -m 'ANNOTATION MESSAGE' TAG_NAME COMMIT_HASH - add tag with annotation

git commit -C COMMIT_HASH - copy author and date for current commit
git commit -C COMMIT_HASH --reset-author - copy without author
git commit --amend - add changed files to new commit with previous commit data
git commit --amend --no-edit - without opening editor
git commit --amend --reset-author - add current author of commit

git reset === git reset HEAD - purge index
git reset PATH_TO_FILE - reset file
git reset COMMIT_HASH PATH_TO_FILE - update only index to file in commit
git reset --keep - hard reset with save changed files