title: Using com.spotify, how to set the image version
body: <p>Using the com.spotify plugin to Maven to automate the building of Docker images, how does one set the version image? </p>
  
  <p>It appears to, by default, use the Maven version. I can also use <code>&lt;useGitCommitId&gt;</code> to make it the git commit short hash, instead. However, if I wanted it to be a combination of these things, or something else, entirely, how would that be accomplished?</p>