Right now the ostree block is mapping variants and arches has to duplicate the same config for each architecture, despite the config being identical.

https://pagure.io/pungi-fedora/blob/22fc96e0b0a3c5a005ed34844d401d54c0027693/f/fedora.conf#_709-749

The Atomic variant has the same config three times, once for each architecture. But the config for different arches in the same repo should most likely be the same.

Instead it should look like this:

ostree = {
    "^Atomic$": {
        "version": '!OSTREE_VERSION_FROM_LABEL_DATE_TYPE_RESPIN',
        "treefile": "fedora-atomic-host.json",
        "config_url": "https://pagure.io/fedora-atomic.git",
        "config_branch": "master",
        "repo": "Everything",
        "ostree_repo": "/mnt/koji/compose/atomic/rawhide/",
        "arches": ["aarch64", "ppc64le", "x86_64"],
        "failable": ["*"],
    }
}

Right now we allow only one ostree per variant.arch combination, so it probably makes sense to limit to one ostree per variant generally.

CC @dustymabe for feedback