Just thought I'd drop a note about integrating git and trac together. I have this working now so that commits will send out an email and if the commit message has the right magic keywords, the corresponding trac ticket will be updated appropriately.
Look in /project/cmucl/public_html/git for post-receive. This should be copied (or linked) to hooks/post-receive. Post-receive as a wrapper script that runs post-receive-email and trac-post-receive-hook.3.py. (All of these come from the trac git page.) Just follow the instructions inside post-receive-email to configure how your emails are handled. I think you need to run git config in the git directory to update the config appropriately.
For trac-post-receive-hook.3.py, I think all that's needed is to adjust TRAC_ENV to point to your trac directory.
Hope this is helpful,
Ray
BTW, is there a general wiki for common-lisp.net? It would be nice to have one so users could add info like this there.