title: Updating the current branch from parent branch
body: <p>I created a new git branch <code>B</code> from branch <code>A</code> with tracking option.</p>
  
  <p>Now, when <code>A</code> branch gets updated by few commits, I want to pull the commits to <code>B</code> as well, so I can keep track of it, and do not have to face big change sometimes later.</p>
  
  <p>How should I approach this? Is it automatically done in git?</p>