title: git, how to I go back to origin master after pulling a branch
body: <p>This has to be a FAQ, but I can't find it googling.</p>
  
  <p>Another person created a branch, commit'd to it, and pushed it to github using
  git push origin newbranch</p>
  
  <p>I successfully pulled it down using</p>
  
  <pre><code>git pull origin newbranch
  </code></pre>
  
  <p>Now, I want to go back to the origin master version.
  Nothing I do seems to cause the files in the origin master to replace those in the newbranch.</p>
  
  <pre><code>git checkout master
  git checkout origin master
  git pull
  git pull origin HEAD
  etc
  </code></pre>
  
  <p><code>git pull origin master</code> returns:</p>
  
  <pre><code>* branch            master     -&gt; FETCH_HEAD
  Already up-to-date.
  </code></pre>
  
  <p>This can't be hard, but I sure can't figure it out.</p>
  
  <p>'git branch' returns</p>
  
  <pre>
  * master
  </pre>
  
  <p>and 'git branch -r' return</p>
  
  <pre>
    origin/HEAD
    origin/experimental
    origin/master
  </pre>