It takes a lot of time to fetch when running in merge train

We noticed that when danger-review is running in merge train, it takes a lot of time (17 minutes) to fetch: https://gitlab.com/gitlab-org/gitlab/-/jobs/6989901724

It looks like it's Danger internally trying to fetch from running this command:

bundle exec danger --fail-on-errors=true --verbose --danger_id="${danger_id}" --dangerfile="${DANGER_DANGERFILE_PREFIX}Dangerfile";