When buildroot is not existing, mock-config returns an error.
Fixes: https://pagure.io/koji/issue/2642
:thumbsup:
Metadata Update from @tkopecek: - Pull-request tagged with: testing-ready
Metadata Update from @mfilip: - Pull-request tagged with: testing-done
Commit cc35903b fixes this pull-request
Pull-Request has been merged by tkopecek
When buildroot is not existing, mock-config returns an error.
Fixes: https://pagure.io/koji/issue/2642