🐛 use spec's ref instead of canonical ref when copying catalog image #438
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When used in conjuction with a "tag-only" registries.conf mirror registry configuration, our containers/image unpacker fails. This is because we resolve a canonical ref from the tag, and then use the digest-based reference to actually copy the image, thus thwarting the tag-only configuration.
This commit ensures that we always copy the image using the reference provided in the spec.