title: Git reset --hard not working as expected
body: <p>I am trying to inspect the history of a repository. I stopped at a point where I want to return the repository back to a specific commit. I searched and I did</p>
  
  <pre><code>git reset --hard 12345
  </code></pre>
  
  <p>I got the message that HEAD is now at 12345. I opened the folder to see the file I wanted to see but it didn't change! </p>
  
  <p>I wanted to go back to 2009 when that file first created. However the file was in the new version (after editing it in 2010). </p>
  
  <p>I checked the working directory but nothing there. I also ran </p>
  
  <pre><code>git clean -f -d
  </code></pre>
  
  <p>but nothing changed.</p>
  
  <p>I don't know what should I do now. I want to go back in time to see how files were look like, but I want to go back to the whole repository.</p>