title: List commits associated with a given tag with JGit
body: <p>I need to create a history file that details all tags and for each tag, all its commits.</p>
  
  <p>I've tried to call <code>getTags()</code> on the repository object and use those object id's, but they are not commit id's.</p>
  
  <p>I also tried to use <code>getAllRefsByPeeledObjectId()</code> on the repository and that does bring back commits but I can't associate them to tags.</p>
  
  <p>Any ideas?</p>