title: Re-enable mirroring with git-svn
body: <p>For some time now I've been mirroring a Subversion repository to a Git repository. Which has always worked fine. However, due to a crash of a virtual server and not having a backup I've got to setup the mirror again. The repository I need to track is almost 1200 commits big and contains a lot of files (which is the main reason for the Git mirror, as it's so much faster to checkout a copy of the repo).</p>
  
  <p>What I need to do now is make my freshly cloned Git mirror make track the Subversion repository again. I've got no problems adding the new remote ref but can't seem to figure out how to be able to pull svn commits into the Git branch again.</p>
  
  <p>One error I seem to receive is <code>Unable to determine upstream SVN information from working tree history</code>.</p>
  
  <p>How can I re-enable mirroring a Subversion repository on a existing Git branch that's only behind a couple commits from the Subversion repository?</p>