My .gitconfig

.gitconfig

[alias]
  c = commit -m
  a = add
  aa= !git add -u && git add . && git status
  cb = checkout -b
  up = !git fetch origin && git rebase origin/master
  ir = !git rebase -i origin/master
  done = !git fetch && git rebase origin/master && git checkout master && git merge @{-1} && rake && git push
  p = pull --rebase --verbose --stat --prune
  po = !git push -u origin $(git describe --contains --all HEAD)
  lol = log --graph --pretty=format:'%Cred%h%Creset -%C(auto)%d%Creset %an: %s %Cgreen(%cr)'
  lola = log --graph --pretty=format:'%Cred%h%Creset -%C(auto)%d%Creset %an: %s %Cgreen(%cr)' --all
  ign = ls-files -o -i --exclude-standard
  ls = ls-files
  unstage = reset HEAD
  dm = !git checkout master && git branch --merged | grep -v '^\\*' | xargs -r -n 1 git branch -d

Only works with recent git that has %C(auto). Shouldn't be a problem, but if you run into it, use %C(yellow).