First Github Commit w/ Auth Support

getFirstCommit

javascript: 
  const token = '<TOKEN>';
  const opts = {};
  if (token !== '<TOKEN>') {
    opts.headers = {
      'Authorization': 'token ' + token
    }
  };
  (b => fetch('https://api.github.com/repos/' + b[1] + '/commits?sha=' + (b[2] || ''), opts)
             .then(c => Promise.all([c.headers.get('link'), c.json()]))
             .then(c => {
                  if (c[0]) {
                      var d = c[0].split(',')[1].split(';')[0].slice(2, -1);
                      return fetch(d, opts).then(e => e.json())
                  }
   				 return c[1]
			 })
             .then(c => c.pop().html_url)
             .then(c => window.location = c))(window.location.pathname.match(/\/([^\/]+\/[^\/]+)(?:\/tree\/([^\/]+))?/));