Please see the mailing list archives, subject thread: "autobuild".

To sum it up, someone posted that he'd like to see a post-push hook in Fossil's server side. A lot of questions were asked which no one cared to answer.

Then I came along, answered the questions and came up with a small patch to implement a minimal post-push hook. Posted the patch back to the mailing list with a request for suggestions and comments, which everyone ignored. :D 

So, here is my diff (to run against src/xfer.c). Be aware it's not complete, as noted in the code. Discussion, anyone?

[https://dreamtrack.dnsalias.com/downloads/post-push-patch.diff|patch 1]