title: Git-svn 'refs/remotes/tags' exists; cannot create
body: <p>I have a problem when trying to migrate the subversion repository to Git repository</p>
  
  <p>I run by following command</p>
  
  <pre><code>git svn clone -s --ignore-paths="tags" svn://localhost/web .
  </code></pre>
  
  <p>and I got the error message as below,</p>
  
  <pre><code>branch_from: /branches/tags =&gt; /branches/tags/3.7
  Found possible branch point: svn://localhost/web/branches/tags/3.7 =&gt; svn://localhost/web/tags/3.7, 15131
  Initializing parent: refs/remotes/tags/3.7@15131
  W: Ignoring error from SVN, path probably does not exist: (160013): Filesystem has no item: File not found: revision 101, path '/branches/tags/3.7'
  W: Do not be alarmed at the above message git-svn is just searching aggressively for old history.
  This may take a while on large repositories
  Found possible branch point: svn://localhost/web/branches/workspace_production_3.0 =&gt; svn://localhost/web/branches/tags/3.7, 10538
  Found branch parent: (refs/remotes/tags/3.7@15131) a7067c8515c17c7f0bf8c6390a785426a8de5b83
  Following parent with do_switch
  Successfully followed parent
  error: 'refs/remotes/tags' exists; cannot create 'refs/remotes/tags/3.7@15131'
  fatal: Cannot lock the ref 'refs/remotes/tags/3.7@15131'.
  update-ref -m r10539 refs/remotes/tags/3.7@15131 67f3c547c7dfac657fcfd7759746f44eb74b187f: command returned error: 128
  </code></pre>
  
  <p>actually I don't want to ignore any path, but seem like tags occurs the problem, so I put it to the ignore-path.</p>
  
  <p>Do I missing something?</p>