Where is Android 4.1 (Jelly bean) source code?
===

I am looking for Android 4.1(jelly bean) source code. Over the internet there are lots of blog mentioning that source code has been published. But I couldn't figure out where.

I looked here http://source.android.com/ , But it is showing source code for Android 4.0. I downloaded the whole repo but couldn't fine the 4.1 branch. Am I missing something here? 

Can Any one help me to find the source code?