Howtoforge posted a tutorial about setting up a Debian Wheezy based local gut server with Git Lite Workflow

This howto describes a shared local git server setup for a small team. This is a repository layout that is familiar to anyone used to working with a traditional version control system. One of the tutorial objectives is to show detailed steps to prepare the server and publish the code on a public service like Github, Gitorius et. al. A second objective is to introduce the Git Lite Workflow in team development. This serves as an introduction to gits powerful branch and merge features. Your personal favorite workflow may be different compared to this model.

  Debian Wheezy Local Git Server With Git Lite Workflow