Copy and paste this into your .gitconfig. (located in your home directory)

.gitconfig

[color]
  diff = auto
  status = auto
  branch = auto
  interactive = auto
  ui = auto
  pager = true

[color "branch"]
  current = yellow reverse
  local = yellow
  remote = green

[color "diff"]
  meta = yellow bold
  frag = magenta
  old = red
  new = green

[color "status"]
  added = green
  changed = yellow bold
  untracked = white

[core]
  pager = less -FRSX
  whitespace=fix,-indent-with-non-tab,trailing-space,cr-at-eol

[alias]
  co = checkout
  st = status
  ci = commit
  w  = whatchanged
  nb = checkout -b
  b  = branch

[push]

	default = current
[pull]
	default = current