docs: def _revision_url(cls, rev, branch, target_platform):
          """Retrieve the URL for revision based builds"""
          namespace = 'gecko.v2.mozilla-' + branch + '.revision.' + rev
          product = 'mobile' if 'android' in target_platform else 'firefox'
          return cls.URL_BASE + '/task/' + namespace + '.' + product + '.' + target_platform