title: git - new user trying to do pull and getting some confusing messages
body: <p>I am pretty new to git. I have been primarily checking stuff into a repository, but now I want to get the latest changes from another developer.</p>
  
  <p>I tried to simply do a command like <code>git pull</code> something ran, but it came back with a message like this:</p>
  
  <pre><code>There is no tracking information for the current branch.
  Please specify which branch you want to merge with.
  See git-pull(1) for details
  
      git pull &lt;remote&gt; &lt;branch&gt;
  
  If you wish to set tracking information for this branch you can do so with:
  
      git branch --set-upstream develop origin/&lt;branch&gt;
  </code></pre>
  
  <p>So then I did <code>git pull my_branch_name</code></p>
  
  <p>and it came back with this:</p>
  
  <pre><code>fatal: 'develop' does not appear to be a git repository
  fatal: The remote end hung up unexpectedly
  </code></pre>
  
  <p>but I had done <code>git checkout my_branch</code> right before that.</p>
  
  <p>Could someone please let me know what I did wrong and how I can simply get the latest files that had been checked in?</p>
  
  <p>Thanks!</p>