Create your .gitconfig file in your home directory.

vim ~/.gitconfig

Copy and paste the following lines to ~/.gitconfig file.

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

Now, run some git commands to see some colorful output:

git status
git branch
git log -p

Bonus: Lets add some aliases to .gitconfig.

[alias]
  st = status
  df = diff
  lg = log -p

Wanna learn more about git ? Lets cheat!

$ sudo gem install cheat
$ cheat git