500 error when importing from GitHub - Octokit::RepositoryUnavailable: 403 - Repository access blocked

https://sentry.gitlab.net/gitlab/gitlabcom/issues/873755/

Octokit::RepositoryUnavailable: GET: 403 - Repository access blocked
  octokit/response/raise_error.rb:16:in `on_complete'
    raise error
  faraday/response.rb:9:in `block in call'
    on_complete(environment)
  faraday/response.rb:61:in `on_complete'
    yield(env)
  faraday/response.rb:8:in `call'
    @app.call(env).on_complete do |environment|
  gitlab/octokit/middleware.rb:13:in `call'
    @app.call(env)
...
(139 additional frame(s) were not displayed)

Octokit::RepositoryUnavailable: GET: 403 - Repository access blocked

Related Support Tickets (internal)

• https://gitlab.zendesk.com/agent/tickets/127754