title: a Jenkins job for every pull request
body: <p>I want to do a very simple thing - for every new pull request that is being created under my repo, I want to create a new jenkins job with similer configuration (run some batch), that will checkout the branch that is being merged (not the destination branch). </p>
  
  <p>I will also like to delete this job after the pull request is approved, but that's not as important.</p>
  
  <p>How do I do that? Every jenkins plugin that I found creates jobs for all my branches, or for a specified list of branches, instead of just for new ones or just unmerged pull requests</p>