How to recreate a git svn remote tracking branch?

Question

Hello,

I'm using git as an interface to an SVN repository. Now I've created a SVN branch:

git svn branch my_branch

This created the directory in my SVN repository, and also created a branch called remotes/my_branch. Then I've deleted that remote tracking branch:

git branch -r -d my_branch

Now the directory is still there in the SVN repository, but I can't seem to find a way to get the remote tracking branch back. Any idea? I tried

git svn branch my_branch
=> branch test_new_mod_named already exists

and played around with git svn reset, etc. to no avail.