Put this in your ~/.bash_profile or ~/.bashrc file. Then type source ~/.bashrc or source ~/.bash_profile to reload.

pimp_prompt.sh

parse_git_branch() {
  ref=$(git symbolic-ref -q HEAD 2> /dev/null) || return
printf "${1:-(%s)}" "${ref#refs/heads/}"
}

pimp_prompt() {
  local BLUE="\[\033[0;34m\]"
  local BLUE_BOLD="\[\033[1;34m\]"
  local RED="\[\033[0;31m\]"
  local LIGHT_RED="\[\033[1;31m\]"
  local GREEN="\[\033[0;32m\]"
  local LIGHT_GREEN="\[\033[1;32m\]"
  local WHITE="\[\033[0;37m\]"
  local WHITE_BOLD="\[\033[1;37m\]"
  local LIGHT_GRAY="\[\033[0;37m\]"
  local STANDARD="\[\033[0;39m\]"
  case $TERM in
    xterm*)
    TITLEBAR='\[\033]0;\u@\h:\w\007\]'
    ;;
    *)
    TITLEBAR=""
    ;;
  esac

PS1="${TITLEBAR}[$STANDARD\u@$BLUE_BOLD\h$STANDARD \W$GREEN\$(parse_git_branch)$STANDARD]\$ "
PS2='> '
PS4='+ '
}
pimp_prompt