title: How to checkout external git library in a svn repository
body: <p>I am working on a project which uses svn repository. Currently, we need to add a third party library which is on git. Is it possible add a specific git tag as an external in svn repository property? If it is, please let me know how to achieve it.</p>
  
  <p>Thanks,</p>
  
  <p>Rong</p>