title: How to create tag with forward slash in its name
body: <p>Is there any way to create git tag with forward slash in its name when I already have the similar-looking one?</p>
  
  <p>Suppose that I have "1.16.0" tag and I want to create "1.16.0/1.0.0" tag:</p>
  
  <pre><code>$ git tag "1.16.0/1.0.0"
  error: 'refs/tags/1.16.0' exists; cannot create 'refs/tags/1.16.0/1.0.0'
  fatal: refs/tags/1.16.0/1.0.0: cannot lock the ref
  </code></pre>