If you want to try it out, you can download this zip-ball:

git-prompt.zip

Unpack that into your User folder, and add this to your bash .profile:

# Git Prompt - Modified from: http://volnitsky.com/project/git-prompt/
[[ $- == *i* ]] && . ~/git-prompt/git-prompt.sh

Tip: You can open your .profile from your terminal like so:

open ~/.profile

Note: You will need to start a new shell session after editing that file in order to see the changes.

I use Nano as my default bash text editor. If you want that, add this to your .profile:

# Use the nano text editor
export EDITOR="nano"

And for the Terminal.app style:

Power-User-Pro.terminal.zip

The shell commands (copy-paste):

mkdir Test
cd Test/
git init
touch somefile
git add somefile
git commit -m "commit message"
echo "hi" > somefile
git add somefile
git commit -m "second commit"
git checkout -b temp
echo "hello" > somefile
git add .
git commit -m "3rd commit"