My sample .gitconfig file, with some customizations.

gistfile1.txt

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

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

[user]
name = Matheus E. Muller
  email=hello@memuller.com

[github]
  user = memuller
  token = censored
[giggle]
  compact-mode = false
  main-window-maximized = false
  main-window-geometry = 1178x875+1354+56
[cola]
  savewindowsettings = true
  geometry = 936x485+296,75
[alias]
  st = status
  ci = commit
  cia = commit -a
  cim = commit -m
  ciam = commit -a -m
  cii = commit --interactive
  co = checkout
  br = branch
  pl = pull
  ps = push
  pso = push origin master
  psa = push --all
  df = diff
  lg = log --pretty=oneline
  sa = stash apply
  ss = stash create
[merge]
  summary = true

WOW!