title: Jenkins get URL of Downstream Job without Waiting
body: <p>How do I retrieve the URL of a Jenkins downstream job without waiting for the job to finish? I can access the downstream job in the Jenkins web interface, but I cannot retrieve the URL immediately in the upstream pipeline.</p>
  <pre><code>my_job = null
  
  my_job = build job: 'Downstream Job', wait: false, propagate: false
  
  my_job_url = my_job.getAbsoluteUrl() // my_job is still null
  </code></pre>
  <p>Is this not possible?</p>