title: How do I get the "changes" (commit message) that triggered a Jenkins build?
body: <p>I can go to </p>
  
  <pre><code>http://myjenkins:8080/job/Project/42/changes
  </code></pre>
  
  <p>and see the commit message that triggered a particular Jenkins build.</p>
  
  <p>However, I want to grab this via REST API or something. I'm not having any luck in search. Is there an easy way to do this?</p>