title: Why is "origin/HEAD" shown when running "git branch -r"?
body: <p>When you run <code>git branch -r</code> why the blazes does it list <code>origin/HEAD</code>? For example, there's a remote repo on GitHub, say, with two branches: master and awesome-feature. If I do <code>git clone</code> to grab it and then go into my new directory and list the branches, I see this:</p>
  
  <pre><code>$ git branch -r
  origin/HEAD
  origin/master
  origin/awesome-feature
  </code></pre>
  
  <p>Or whatever order it would be in (alpha? I'm faking this example to keep the identity of an innocent repo secret). So what's the <code>HEAD</code> business? Is it what the last person to <code>push</code> had their <code>HEAD</code> pointed at when they pushed? Won't that always be whatever it was they <code>push</code>ed? <code>HEAD</code>s move around... why do I care what someone's <code>HEAD</code> pointed at on another machine?</p>
  
  <p>I'm just getting a handle on remote tracking and such, so this is one lingering confusion. Thanks!</p>
  
  <p>EDIT: I was under the impression that dedicated remote repos (like GitHub where no one will ssh in and work on that code, but only pull or push, etc) didn't and shouldn't have a HEAD because there was, basically, no working copy. Not so?</p>