$ skopeo copy oci-archive:/var/lib/mock/f42-flatpak-container-build-59160398-6571353/root/chroot_tmpdir/gthumb-flatpak-3.12.7-2.ppc64le.oci.tar docker://candidate-registry.fedoraproject.org/gthumb:f42-flatpak-container-build-132060245-ppc64le-20250428041956
Getting image source signatures
Copying blob sha256:b957f80e01831bf841370f4a58e879668b82bc019471c215321c6af1fd240a49
Copying config sha256:30b43f6256abd1d8ffa5937907b8a3a06b8e873e9468ac09cd00ee280aaa933b
Writing manifest to image destination