title: Changing Jenkins build number
body: <p>Is there a way to change the build number that is sent via email after a job completes?  The problem is that are product builds are NOT being done by Jenkins, so we want to be able to get the build number(ie. from a text file) and update the build number in Jenkins to match it.    I have tried to set the build number:</p>
  
  <pre><code>set BUILD_NUMBER=45
  </code></pre>
  
  <p>But the email is still showing the build number that Jenkins originally set.</p>