title: How to solve fatal: unable to access, Received HTTP code 400 from proxy after CONNECT
body: <p>When I try to get a pull form master using <code>git pull origin master</code> I get the following proxy error.</p>
  
  <p><code>fatal: unable to access 'https://github.com/xxx/xxx.git/': Received HTTP code 400 from proxy after CONNECT</code></p>
  
  <p>I'm working on a macOS Mojave and I haven't configured any proxy servers either. Anyone know how to fix this issue?</p>