Latest kernel documentation tree

Hello, Im trying to follow the documentation work of converting to Sphinx etc that Jon, Mauro and others are doing ( inferring from the patches coming into kernel-docs@ ). Id like to be able to pull and build the Sphinx based docs, learn and possibly even contribute (wish, wish...). However, Im stuck on a very mundane thing. Im not quite sure which tree has the latest sources. I looked at kernel/kernel-docs.git on git.kernel.org but that seems stale. Im not quite sure if its kernel/gregkh/staging.git. Can someone kindly point me to the correct tree that has the latest sources of Sphinx docs? Thanks Jai