Failure during docker-publish: python3: command not found

Describe the bug

At some point today, the docker-publish job began failing with an error like:

/scripts-25102-13085290/step_script: line 550: python3: command not found

No changes to our pipelines were made. No changes to the to-be-continuous versions were made.

docker-publish succeeds as it did previously.

docker-publish fails

See above

It looks like the quay.io/containers/skopeo:latest image that this job uses was updated about 45 minutes ago (https://quay.io/repository/skopeo/stable?tab=history).

The skopeo image is based off of registry.fedoraproject.org/fedora:latest (https://github.com/containers/image_build/blob/main/skopeo/Containerfile#L21).

fedora:latest changed from Fedora 42 to 43 earlier this morning (https://quay.io/repository/fedora/fedora?tab=history).

In Fedora 42, the skopeo rpm brought in python3 as a dependency. In Fedora 43, it no longer does, so python3 is not installed in the image.