Hi,
We are doing something on a similar vein, as we wanted to use Gource to show how pretty our source code was.
here is a link to what the gource site suggests
So I setup a scheduled task to perform every 6 hours (you could do yours more often of course) which would use the git svn fetch
function to pull the latest revisions from our svn server to our git install.
It may be possible to do it as part of your Constant Build Server functionallity, I think that's the right term? (as your cruise control, teamcity, or other builds you could perform a git conversion).
Cheers
Luke
(P.S: never could get the git svn rebase to work properly, so am constantly performing a fetch)