title: git tag add a file to a previous tag
body: <p>I would like to know your inputs or recommended work flow in Git on how to add a single file to a previous tag a revision release in Git.
  This scenario is seen when say a new Firmware release and the firmware file needs to be available to all release versions (which are tagged).</p>
  
  <p>in CVS, I can simply just <code>cvs add</code> the file and tag it V1.2, V1.3, so on. But how about in Git, how do I make this certain file or files available to the tags when the master has already moved forward?</p>
  
  <p>The goal is to make this files available in the repo so that anyone who wants to generate the release versions can grab these files and include them in the release versions.</p>
  
  <p>Thanks a lot!</p>