title: Git: How can I reset a config parameter after I have accidentally changed it?
body: <p>I was exploring the <code>git config</code> options using tab completion in bash, and without really thinking, I did this:</p>
  
  <pre><code>git config --global user.signingkey --help
  </code></pre>
  
  <p>and now my global signing key is set to <code>--help</code>. Facepalm. Is there a generic way to find out what these config settings where in the past, or is there somewhere that I could look in a project to see what this might have been set to? I have a Github account, maybe I could get the old value from there, since I haven't pushed anything since the mistake? I'm not even sure if it was set to anything, but I do use SSH with Github.</p>
  
  <pre><code>cd &lt;another project's location&gt;; git config user.signingkey
  </code></pre>
  
  <p>returns <code>--help</code>.</p>