You can also have fun by tagging arbitrary objects in git:<p><i>[...] you can tag any Git object. In the Git source code, for example, the maintainer has added their GPG public key as a blob object and then tagged it. You can view the public key by running this in a clone of the Git repository:</i><p><pre><code> git cat-file blob junio-gpg-pub
</code></pre>
<a href="https://git-scm.com/book/en/v2/Git-Internals-Git-References" rel="nofollow">https://git-scm.com/book/en/v2/Git-Internals-Git-References</a>