title: git show last checking when commiting
body: <p>Is it possible to show the text of the last commit when I do a git commit.</p>
  
  <p>I frequently need to check in and associate with a ticket number and I always tend to forget the number and have to go back and do a git log to find out the previous commit and get the ticket id, it would reduce a bit of friction of this was just included in the commit comments that are shown.</p>