title: How to get back to most recent version in Git?
body: <p>I have recently moved from SVN to Git and am a bit confused about something. I needed to run the previous version of a script through a debugger, so I did <code>git checkout &lt;previous version hash&gt;</code> and did what I needed to do.</p>
  
  <p>Now I want to get back to the newest version, but I don't know the hash for it. When I type <code>git log</code>, I don't see it.</p>
  
  <p>How can I do this? Also, is there an easier way to change versions than by typing out hashes - something like "go back two versions" or "go to the most chronologically recent"?</p>