title: GIT - Can I merge a branch up to a specific commit
body: <p>I currently have a UAT branch and a master branch. I merge the UAT branch into Master on a weekly basis (after a weekly release). </p>
  
  <p>I have foolishly checked in another item onto UAT before doing the merge. </p>
  
  <p>Can I do something like this: </p>
  
  <p>git merge uat 4d9ed3b8122a215f64f07028c92bb0cb0a8b4570</p>
  
  <p>So would that merge UAT up to that commit?</p>