title: Redeploy Heroku app without code changes
body: <p>I would like to deploy a Heroku app which will be done ideally using <code>git push -u heroku master</code>. However this will only work if there are any pending commits to be pushed to master. </p>
  
  <p>How can I redeploy the app while there is nothing to push ? I tried <code>git push -u heroku master -f</code> and still get the same below</p>
  
  <pre><code>Branch master set up to track remote branch master from heroku.
  Everything up-to-date
  </code></pre>
  
  <p>PS: I also want to retain the existing app, which means I cannot make use of this answer <a href="https://stackoverflow.com/a/22043184/968442">https://stackoverflow.com/a/22043184/968442</a></p>