title: Git merge two local branches
body: <p>I have branch <code>Master</code>, <code>branchA</code> and <code>branchB</code>.
  Now I'm working in the <code>branchA</code> and I need to merge <code>branchA</code> with <code>branchB</code> and proceed my work in the <code>branchA</code>. All files are comitted in the <code>branchA</code> and <code>branchB</code>.</p>
  <p>What's the fast way to implement it?</p>