$ mount -t none -o bind /mnt/koji/ /var/lib/mock/eln-build-58971395-6569510/root/mnt/koji
$ mount -t none -o bind /mnt/koji/compose/eln/Fedora-eln-20250421.n.0 /var/lib/mock/eln-build-58971395-6569510/root/mnt/koji/compose/eln/Fedora-eln-20250421.n.0