title: How to make SCM polling work with the Jenkins Workflow plugin
body: <p>In a normal freestyle project, I configure the SCM plugin to point to the Git repo that I want to release, and I enable the "Poll SCM" option, which allows me to configure a Stash webhook to tell Jenkins whenever there has been a change to that repo. In this way, the job can be triggered whenever a change is pushed to the repo.</p>
  
  <p>But when I use a workflow instead of a freestyle project, the SCM of the code that I need to build is specified programmatically in the groovy workflow script, which means that it is not listening for the Stash webhook. Instead, the SCM that is configured directly in the workflow is the SCM of the groovy script itself, which is different than the codebase that I am trying to build/release, so I don't want the trigger to be based on that. </p>
  
  <pre><code>node('docker_builder') {
      git url: serviceRepo
      releaseVersion = getVersion()
      pipelineSpec = getPipelineSpec()
      sh "./gradlew clean build pushDockerImage"
  }
  </code></pre>
  
  <p>Any ideas about how to achieve SCM polling when using the workflow plugin? </p>