Well we all know that git is a great tool for managing your code, but what about if you want to manage git access to your various repos. Welcome to gitolite available under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.

"Gitolite allows you to setup git hosting on a central server, with fine-grained access control and many more powerful features."  gitolite.com

For help in setting this up I found a useful article that explains a little about how it works here:

I have seen various people using Git on a daily basis from design agencies to software houses, all in slightly different ways. There are many reasons for using Git or even other version control systems especially where there are two or more people collaborating on any one project at the same time.