Hosting Private Git repos on my own server? [closed]

Question

I am looking for a way to host private git repos on my own server.
I am using Github for Open source projects of mine, but I would prefer to use my own server for storing private git repos.

Can someone suggest me on which script should I be using for this purpose.
Trac is not what I am looking for, though. I want something that is, preferably PHP based solution (just optional) and esp. something that has an easier UI.

Any help is appreciated here.