Using git-svn with svnsync mirror

Hi,

I've got an svnsync mirror of a large repository, and I'm trying to do
a git-svn clone from the mirror as the main server is off site. This
works well until I try to dcommit or use git svn info.

My investigations show that working_head_info in git-svn doesn't
account for using svnsync properties, so it cannot find a log entry
that matches a config entry.

My perl isn't good enough to patch this yet, so I was wondering if
anyone else had encountered it.

I could change the config URL to match, but I'm worried this will
break things.