pungi.global.log
[ERROR ] Compose run failed: ImageBuild task failed: 33772370. See /mnt/koji/compose/container/Fedora-Container-28-20190326.0/logs/aarch64-armhfp-ppc64le-s390x-x86_64/imagebuild-Container-Container_Minimal_Base-docker.aarch64-armhfp-ppc64le-s390x-x86_64.log for more details.
This is due to it looking for fedora-release-container in %post, but we never backported that change to f28 so it fails.
I sent a PR to revert it back to using fedora-release.