$ mount -t none -o bind /mnt/koji/ /var/lib/mock/f42-build-59034086-6570492/root/mnt/koji
$ mount -t none -o bind /mnt/koji/compose/updates/Fedora-42-updates-testing-20250423.0 /var/lib/mock/f42-build-59034086-6570492/root/mnt/koji/compose/updates/Fedora-42-updates-testing-20250423.0