title: Change the origin of git branch
body: <p>I have created branch this way:</p>
  
  <pre><code>git branch MyBranch origin/test
  </code></pre>
  
  <p><code>test</code> was branch parallel to master. Now test is merged into master</p>
  
  <p>How can i change the origin of <code>MyBranch</code> so it points to master</p>