Homebrew update failure on mac
<p>Upon doing a <code>brew update</code>, I get the following errors:</p>

<pre><code>fatal: Unable to find remote helper for 'https'
Error: Fetching /usr/local failed!
fatal: Unable to find remote helper for 'https'
Error: Fetching /usr/local/Library/Taps/caskroom/homebrew-cask failed!
Already up-to-date.
</code></pre>