My zsh theme (you have to place it in ~/.oh-my-zsh/themes/ and change ZSH_THEME to gecko in your .zshrc)

gecko.zsh-theme

# this theme was build be taking some code and impressions from mortalscumbag, intheloop, crcandy and bureau

bureau_git_branch () {
  ref=$(command git symbolic-ref HEAD 2> /dev/null) || \
  ref=$(command git rev-parse --short HEAD 2> /dev/null) || return
  echo "${ref#refs/heads/}"
}

bureau_git_status () {
  _INDEX=$(command git status --porcelain -b 2> /dev/null)
  _STATUS=""
  if $(echo "$_INDEX" | grep '^[AMRD]. ' &> /dev/null); then
    _STATUS="$_STATUS$ZSH_THEME_GIT_PROMPT_STAGED"
  fi
  if $(echo "$_INDEX" | grep '^.[MTD] ' &> /dev/null); then
    _STATUS="$_STATUS$ZSH_THEME_GIT_PROMPT_UNSTAGED"
  fi
  if $(echo "$_INDEX" | grep -E '^\?\? ' &> /dev/null); then
    _STATUS="$_STATUS$ZSH_THEME_GIT_PROMPT_UNTRACKED"
  fi
  if $(echo "$_INDEX" | grep '^UU ' &> /dev/null); then
    _STATUS="$_STATUS$ZSH_THEME_GIT_PROMPT_UNMERGED"
  fi
  if $(command git rev-parse --verify refs/stash >/dev/null 2>&1); then
    _STATUS="$_STATUS$ZSH_THEME_GIT_PROMPT_STASHED"
  fi
  if $(echo "$_INDEX" | grep '^## .*ahead' &> /dev/null); then
    _STATUS="$_STATUS$ZSH_THEME_GIT_PROMPT_AHEAD"
  fi
  if $(echo "$_INDEX" | grep '^## .*behind' &> /dev/null); then
    _STATUS="$_STATUS$ZSH_THEME_GIT_PROMPT_BEHIND"
  fi
  if $(echo "$_INDEX" | grep '^## .*diverged' &> /dev/null); then
    _STATUS="$_STATUS$ZSH_THEME_GIT_PROMPT_DIVERGED"
  fi

  echo $_STATUS
}

bureau_git_prompt () {
  local _branch=$(bureau_git_branch)
  local _status=$(bureau_git_status)
  local _result=""
  if [[ "${_branch}x" != "x" ]]; then
    _result="$ZSH_THEME_GIT_PROMPT_PREFIX$_branch"
    if [[ "${_status}x" != "x" ]]; then
      _result="$_result $_status"
    fi
    _result="$_result$ZSH_THEME_GIT_PROMPT_SUFFIX"
  fi
  echo $_result
}

local ret_status="%(?::%{$fg[red]%} [%{$fg[yellow]%}⚡%?%{$fg[red]%}]%{$reset_color%})"
PROMPT=$'
%{$fg[green]%}%n@%m %{$fg[blue]%}[%*] %{$reset_color%}%{$fg[white]%}[%~]%{$reset_color%}${ret_status} $(bureau_git_prompt)\
%{$fg_bold[blue]%}  %{$reset_color%}'

ZSH_THEME_GIT_PROMPT_PREFIX="%{$fg[green]%}[  "
ZSH_THEME_GIT_PROMPT_AHEAD="%{$fg[cyan]%}▴"
ZSH_THEME_GIT_PROMPT_BEHIND="%{$fg[magenta]%}▾"
ZSH_THEME_GIT_PROMPT_DIVERGED="%{$fg[magenta]%}"
ZSH_THEME_GIT_PROMPT_STAGED="%{$fg[green]%}"
ZSH_THEME_GIT_PROMPT_UNSTAGED="%{$fg[red]%}"
ZSH_THEME_GIT_PROMPT_UNTRACKED="%{$fg[white]%}●"
ZSH_THEME_GIT_PROMPT_UNMERGED="%{$fg_bold[red]%}✕"
ZSH_THEME_GIT_PROMPT_SUFFIX="%{$reset_color%}%{$fg[green]%}]%{$reset_color%}"