title: Create new branch based on current branch to work on a new feature
body: <p>How do I create a new branch in <code>git</code> to begin work on a new feature?</p>
  <p>I want the new branch to be a duplicate of the current branch (ie, the new branch's HEAD should be the same as the current HEAD).</p>
  <hr />
  <p>Question differentiation:</p>
  <ul>
  <li><a href="https://stackoverflow.com/q/4470523/5353461">Create a branch in Git from another branch</a> seems related but is actually about why a branch is fast-forward merged.</li>
  <li><a href="https://stackoverflow.com/questions/1519006/how-do-you-create-a-remote-git-branch">How do you create a remote Git branch?</a> is about creating a new branch on a <a href="https://manned.org/git-remote" rel="noreferrer">remote</a>.</li>
  </ul>