title: git fetch does not update my local branch
body: <p>I am new to git (have used other version control systems like Perforce) but what I am trying to do seems very basic to do it wrong.</p>
  
  <p>I have a local workspace and a remote one. I want to bring changes from the remote to local (not force update but merge them with my local workspace).</p>
  
  <p>If I do this :</p>
  
  <pre><code>git diff master remote_name/master
  </code></pre>
  
  <p>I can see there are a lot of differences.</p>
  
  <p>So, I am trying to fetch stuff from remote :</p>
  
  <p>Tried both :</p>
  
  <pre><code>git fetch remote_server
  git fetch remote_server master
  </code></pre>
  
  <p>where remote_server is the name I have given (I see this if I run <code>git remote -v</code> )</p>
  
  <p>But my local files do not change.</p>
  
  <p>What am I missing?</p>