Importing a strange svn repo layout w/ git-svn

I'm working on cloning the MediaWiki (a common wiki engine, used to power e.g. wikipedia.org) Subversion tree using git-svn. It has this peculiar layout:

$BASE/trunk/phase3 is the project trunk $BASE/tags/TAG_NAME/phase3 is the tag TAG_NAME $BASE/branches/BRANCH_NAME/phase3 is the branch BRANCH_NAME

"phase3" is not the only directory in e.g. http://svn.wikimedia.org/svnroot/mediawiki/branches/REL1_12/ - there is also an "extensions" directory, a snapshot of MediaWiki extensions for that branch. But those are truly separate projects with separate contributors, and have to be installed in a separate place.

When cloning other svn repositories, I saw that strange layouts can be accommodated by just cloning the trunk. But in this case,

I considered using git-svn like this:

$ git svn http://svn.wikimedia.org/svnroot/mediawiki/ -t tags/phase3/ -b branches/phase3/ -T trunk/phase3/

But that wouldn't be correct, since it wouldn't actually pick up the tag or branch names!

Is there a way to get git-svn to handle this situation? Perhaps git-svn has a "suffix $DIR to the repository URL" option that I missed. If not, is it conceivable it could?

-- Asheesh.