What is the whole process of cooking git as a maintainer?

I have scanned the manual and found a 'Linux subsystem maintainer' example. However, that's a little brief and i wonder a more real example. I think an example of how to cook git as a maintainer is better.

Junio , could you please share the whole process of cooking among pu, next and master? Or, can i find this in the mail list archive?

For example: In which branch the test is performed? How to rewind pu? How to merge a subset of changes from pu to next, and from next to master?