title: git ls-tree HEAD - meaning of third column
body: <p>What does the string in the third column mean when we do </p>
  
  <pre><code>$ git ls-tree HEAD
  </code></pre>
  
  <p>like so </p>
  
  <p><img src="https://i.stack.imgur.com/NE7Qn.png" alt="enter image description here"></p>