title: Trigger a pipeline jenkins job by commits from multiple repositories
body: <p>I have a pipeline (jenkins) job, which uses multiple repositories.</p>
  
  <p>The repositories are checkout out like this:</p>
  
  <p><code>
  checkout([$class: 'GitSCM', ...])
  </code></p>
  
  <p>Now I want to trigger the job when a commit is done to <em>any</em> of the repositories. How can I configure this?</p>