title: How to merge android repo branch off old release to new release master?
body: <p>We have an android platform repo branch worked on by a vendor. Lets say it is vendor-branch. It is based off release 1.0. The vendor-branch changes were never committed to release 1.0.</p>
  
  <p>Now we are working on release 3.0. But I want to start where the vendor left off in vendor-branch and merge with release 3.0 workspace.</p>
  
  <p>How do I do that with android repo tool?</p>
  
  <p>I have done repo init with 3.0 followed by repo sync. I am looking for a way to merge vendor-branch changes onto 3.0 version in my workspace. </p>
  
  <p>What is the right repo command for this?</p>
  
  <p>Is there a web page that explains different sub commands of repo?</p>
  
  <p>Thanks<br>
  Videoguy</p>