I'll post this to the wiki.
The command to get started is:
git svn clone \
http://svn.fedorahosted.org/svn/pki \
--prefix svn \
-T trunk -b branches -t tags
perhaps a better prefix is pkisvn
the get hep URLS are:
http://cheat.errtheblog.com/s/git
http://www.jukie.net/~bart/blog/svn-branches-in-git