title: Git lost commits
body: <p>I was trying to fix a problem in git and accidentally used git reset --hard to some previous commit. So now I cannot get back to the old head.</p>
  
  <p>However I did clone the repository before I did this, and so I pushed the missing commits back to the original. This seemed to work yesterday, but today I see that the original is still stuck on an old commit and the new ones seemingly don't exist.
  Trying to push the new commits from the clone again don't work as git tells me everything is up to date.</p>
  
  <p>How do I fix this?</p>