title: Rewrite git-svn repository with '--ignore-paths' after clone
body: <p>I have big svn repository cloned with <code>git-svn</code> without any excluding/ignoring directories.</p>
  
  <p>Now, I want to exclude one folder from cloned repo.</p>
  
  <p>It is possible to add <code>--ignore-paths</code> to existing git-svn repository? Need to rewrite history to increase free space and accelerate <code>fetch</code>.</p>