title: How to catch-up named mercurial branch from default branch without merging the two into one?
body: <p>I have two branches in mercurial..</p>
  
  <pre><code>default    named
  |r1
  |r2
  |r3 --------         named branch created here.
  |            |r4
  |            |r5
  | r6         |
  |            |r7
  |            |
  -----------&gt; | r8    How do I achieve this catch-up?
  |            |
  </code></pre>
  
  <p>I want to update the named branch from default, but I'm not ready to merge the branches yet. How do I achieve this?</p>
  
  <p>Edit:</p>
  
  <p>Additionally, what would the operation be using the GUI?
  Is it.. right-click r6, merge with..., r8,... then what? commit to named branch?</p>