title: Move branch to another branch
body: <p>I have started doing some work on a branch which I have in term realised was the wrong branch. Is there a way to move a branch to a different branch.</p>
  
  <p>For example:</p>
  
  <pre><code>A -- B -- C -- D -- HEAD
   \-- E -- F -- G -- H -- I -- J
        \-- K -- L
  </code></pre>
  
  <p>And I want this:</p>
  
  <pre><code>A -- B -- C -- D -- HEAD
   \    \-- K -- L
    \
     \-- E -- F -- G -- H -- I -- J
  </code></pre>