git-svn: how to connect SVN branches?

[dherring@ll.mit.edu]

Hi,

The project I'm tracking changed servers a couple months ago.  To simulate 
the svn-switch, I edited the svn-remote.url to the new location.  `git-svn 
fetch`, `git-svn dcommit`, and the like seemed to work ok.

When a new release branch came out, I tried adding
svn-remote.branches = releases/*:refs/remotes/svn/*

`git-svn fetch` pulled the new branch.  However, it created a whole new 
history for this branch (new git commits from the beginning of the SVN 
repo).

Is there some way to tell git/git-svn to connect these two histories?

Pictorially, I have

SVN1@a---SVN2@a---SVN3@b---SVN4@b---SVNtrunk
SVN1@b---SVN2@b---SVN3@b---SVN4@b---SVNbranch

and want

SVN1@a---SVN2@a---SVN3@b---SVN4@b---SVNtrunk
                                  \--SVNbranch

Similarly, if someone cloned a git repo full of git-svn-id's (which 
indicate that an svn --switch occurred) but without any matching git-svn 
data, is there a way to `git-svn fetch` from the new SVN repo and 
autoconnect the git commits?

Thanks,
Daniel