Some useful git config settings. Save in the file named ".gitconfig" in your home directory.

.gitconfig

[color]
  diff = auto
  status = auto
  branch = auto
  sh = auto
  ui = true
  wtf = auto
[color "branch"]
  current = green reverse
  local = green
  remote = yellow
[color "diff"]
  meta = yellow bold
  frag = magenta bold
  old = red bold
  new = green bold
[color "status"]
  added = yellow
  changed = green
  untracked = cyan

[merge]
  log = true

[alias]
  c = commit -v
  a = add --all
  st = status -s
  changed = ! git status -s | awk '{print $2}' | xargs # use this like "git changed subl", which will open all changed files in Sublime
  co = checkout
  l = log --pretty=format:'%Cred%h%Creset %an -%C(yellow)%d%Creset %s %Cgreen(%cr)%Creset' --abbrev-commit --date=relative
  lg = log --graph --pretty=format:'%Cred%h%Creset %an -%C(yellow)%d%Creset %s %Cgreen(%cr)%Creset' --abbrev-commit --date=relative
  b = branch