title: How to set Subversion properties with git-svn
body: <p>Is there a way to set subversion properties on a git repository that was created by git-svn?</p>
  
  <p>In my case, I want to edit the version of <code>svn:external</code>, <code>svn:ignore</code> and
  <code>svn:executable</code>.</p>
  
  <p>However, the only way to do so seems to involve a check-out with the subversion client. Is there a way to edit svn properties without having to check out the repository twice (one time for git and one time with svn for the properties)?</p>