git-svn: branch trunk/project/code to branches/project-1.0/code

our subversion repository contains various things, which are in
dedicated subdirectories:
trunk/project/code
trunk/project/doc
trunk/project/...

the same is then valid for the branches:
branches/project-1.0/code
branches/project-1.0/doc
branches/project-1.0/...

as there are many folders with big items i tried to only track the
code part, but with branches. i though one can just have something
like:

[svn-remote "svn"]
        url = url-of-svn-repository
        fetch = trunk/project/code:refs/remotes/trunk
        branches = branches/project-*/code:refs/remotes/project-*

but this is not correct. how could one support such branches?

 rupert