Alias for git status with a brief summary:
$ git config --global alias.s "status -sb"
Alias for git log with a pretty format:
$ git config --global alias.lg "log --pretty=format:'%C(yellow)%h%Creset %C(cyan)%ad%Creset %C(red)%an%Creset%C(bold blue)%d%Creset %C(white)%s%Creset'"
Alias for git checkout with a branch name completion: