title: Showing commits made directly to a branch, ignoring merges in Git
body: <p>When using git, is there a way to show commits made to a branch, while ignoring all commits that were brought in by merging?  </p>
  
  <p>I'm trying to review the code changes made on a branch while ignoring the ones we made on other branches that were merged in.  I know it's damn near impossible to show a diff in that fashion, but I'd like to be able to find out which commits I need to review.</p>