We do not yet build all our packages for aarch64, so this would
fall back on the RPMs in the repository. In `main` that seems to
work, as osbuild-composer exists in the base repositoires. Though
we obviously want to test the most recent commit, not the released
RPM, so this is maksing the problem.
As of this PR, the build would fail though: We are now build
UBI containers, where osbuild-composer does not exist, and we have
split the RPM into the new osbuild-composer-core, which does not
yet exist in any base repository.