Git like functionality in web application using python

I have to create a website like mmyweb.com now I want to add a functionlity like "I can initiate a new project and I can allow more then one developer to add his code in it".So website will let them push and pull so I have to keep track of code .And then I can even clone that code in any web server as well . like myweb.com/firstproject

I have searched but didnt get any exact idea or any third party module or open source functionality for this