title: why git-svn should search aggressively for old history?
body: <p>Something strange happened when I ran git svn clone -s, though the following information tells  us to not be alarmed, I wonder why that is kind of svn error? </p>
  
  <p>Why this path does not exist, is it deleted by others?</p>
  
  <p>If yes, why git svn should search  aggressively for old history?</p>
  
  <pre><code>Initializing parent: refs/remotes/tags/sequentialInformationalBottleneckClusterer-1.0.1@8400
  W: Ignoring error from SVN, path probably does not exist: (160013): Filesystem has no item: File not found: revision 101, path '/trunk/packages/internal/sequentialInformationalBottleneckClusterer'
  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
  Checked through r1501
  </code></pre>