GPG key retrieval failed

We have SUMA 3.1.2 installed and are trying to sync a custom repo we created:

spacecmd {SSM:0}> repo_details "GitLab SLES 12-SP2" Repository Label: GitLab SLES 12-SP2 Repository URL: https://packages.gitlab.com/gitlab/gitlab-ee/sles/12.2/x86_64 Repository Type: yum Repository SSL Ca Certificate: None Repository SSL Client Certificate: None Repository SSL Client Key: None

[CODE]spacecmd {SSM:0}> softwarechannel_details gitlab-12-sp2-pool-x86_64
Label: gitlab-12-sp2-pool-x86_64
Name: GitLab-12-SP2-Pool for x86_64
Architecture: x86_64
Parent: sles12-sp2-pool-x86_64
Systems Subscribed: 0
Number of Packages: 0

Summary

GitLab SLES12-SP2 x86_64

GPG Key: E15E78F4
GPG Fingerprint: 1A4C 919D B987 D435 9396 38B9 1421 9A96 E15E 78F4
GPG URL: https://packages.gitlab.com/gitlab/gitlab-ee/gpgkey

Repos

GitLab SLES 12-SP2
[/CODE]

# spacewalk-repo-sync --channel gitlab-12-sp2-pool-x86_64 09:42:56 ====================================== 09:42:56 | Channel: gitlab-12-sp2-pool-x86_64 09:42:56 ====================================== 09:42:56 Sync of channel started. 09:42:58 ChannelException: GPG key retrieval failed: [Errno 14] HTTP Error 404 : https://packages-gitlab-com.s3-accelerate.amazonaws.com/7/11/sles/12.2/x86_64/repodata/repomd.xml.key?AWSAccessKeyId=AKIAJ74R7IHMTQVGFCEA&Signature=s9vWpuVMVOmjyn2vDhSl7jCZFSE%3D&Expires=1510674478 09:42:58 Total time: 0:00:01

Does SUMA not honour the “GPG URL” field when you create a channel? Why is it using the wrong URL for the GPG key?

Redhat honors the “GPG URL” field only for file:// based URLs: https://www.redhat.com/archives/spacewalk-list/2012-January/msg00202.html. Is SUMA doing something similar? If so, what is the magic pathname where I need to deposit the GPG key for the above repo?