title: What is the opposite of 'git checkout HEAD^'?
body: <p>I'm walking through git history with command <code>git checkout</code>. From <code>master</code> I went to e.g commit with hash <code>a7040f35a1e</code>.</p>
  
  <pre><code>git checkout a7040f35a1e
  </code></pre>
  
  <p>Then I went to the previous commit:</p>
  
  <pre><code>git checkout HEAD^
  </code></pre>
  
  <p>How can I return back? I mean how can I go to following commit? Is it possible with the word <code>HEAD</code> + or something?</p>