Fedora CI fails to download packages from Koji <https://gitlab.com/testing-farm/general/-/issues/36>. I can reproduce it locally:

$ rpm -q koji
koji-1.27.0-2.fc36.noarch
[test@fedora-36 tmp]$ koji download-build --debuginfo --task-id --arch noarch --arch x86_64 --arch src 79153156
Downloading: gscan2pdf-2.12.4-1.fc36.src.rpm
2021-11-22 14:51:42,760 [ERROR] koji: HTTPError: 404 Client Error: Not Found for url: https://kojipkgs.fedoraproject.org/packages/packages/gscan2pdf/2.12.4/1.fc36/src/gscan2pdf-2.12.4-1.fc36.src.rpm

This works with koji 1.26.1:

$ rpm -q koji
koji-1.26.1-1.fc34.noarch
petr@dhcp-0-146:/tmp $ koji download-build --debuginfo --task-id --arch noarch --arch x86_64 --arch src 79153156
Downloading: gscan2pdf-2.12.4-1.fc36.src.rpm
[====================================] 100% 515.40 KiB / 515.40 KiB
Downloading: gscan2pdf-2.12.4-1.fc36.noarch.rpm
[====================================] 100% 475.83 KiB / 475.83 KiB
Downloading: gscan2pdf-tests-2.12.4-1.fc36.noarch.rpm
[====================================] 100% 138.95 KiB / 138.95 KiB