title: How do you pull git committer information for Jenkins pipeline
body: <p>I have a pipeline set up in groovy and need to pull the person who committed some code in git so I can publish that persons name who broke the build.  I've searched the web and can't seem to find a solution.  I figured out how to publish posted in slack by using the slack plugin for jenkins.  Example:</p>
  
  <pre><code>slackSend color: 'warning', message: "${git.user_name} broke the build."
  </code></pre>