GIT alias

.gitconfig

[alias]
        co = checkout
        br = branch
        ci = commit
        st = status
        unstage = reset HEAD --
        last = log -1 HEAD
        graph = log --graph
        amsi = commit --amend --signoff
        amend = commit --amend
        aamend = !git add -A && git commit --amend
        
        # Codeschool GIT Real 2
        pushall = push --recurse-submodules=on-demand
        
        # http://haacked.com/archive/2014/07/28/github-flow-aliases/
        ec = config --global -e
        cob = checkout -b
        cm = !git add -A && git commit -m
        save = !git add -A && git commit -m 'SAVEPOINT'
        undo = reset HEAD~1 --mixed
        wipe = !git add -A && git commit -qm 'WIPE SAVEPOINT' && git reset HEAD~1 --hard
        bclean = "!f() { git branch --merged ${1-master} | grep -v " ${1-master}$" | xargs -r git branch -d; }; f"
        bdone = "!f() { git checkout ${1-master} && git up && git bclean ${1-master}; }; f"
        cf = !git reset HEAD --hard && git clean -fd
        
        # git up: only if git up isn't installed
        up = !git pull --rebase --prune --autostash $@ && git submodule update --init --recursive
[pull]
        rebase = true
[branch]
        # old GIT versions
        autosetuprebase = always
[rebase]
        autostash = true
[commit]
        gpgsign = true

Define an alias (git co as alias for git checkout):

git config --global alias.co checkout

Add GPG signing key:

git config --global user.signingkey 741015A8448FF602

If you don't want to type the -S flag every time you commit, you can tell Git to sign your commits automatically:

git config --global commit.gpgsign true

Source: https://gitlab.com/help/user/project/repository/gpg_signed_commits/index.md