title: TortoiseGit - how to review all changes in a branch
body: <p>I have used several version control systems over my career - ClearCase, PVCS, SCCS, Perforce, CVS, SourceSafe - but never used a distributed system before.  </p>
  
  <p>For the first time, I am using a distributed system - Git. It's been weeks - but I cannot make head nor tail of how to do stuff.   </p>
  
  <p>A colleague create a branch and worked on a small feature in the branch. I now want to review all the changes he made in that branch. How do I do this in TortoiseGit (I have hooked up TortoiseGit to Windiff). </p>
  
  <p>Is there a way to see a windiff of all changes done on that branch? What are the steps? </p>