$ git clone -n https://src.fedoraproject.org/rpms/opam.git /var/lib/mock/f40-build-2511307-61710/root/chroot_tmpdir/scmroot/opam
Cloning into '/var/lib/mock/f40-build-2511307-61710/root/chroot_tmpdir/scmroot/opam'...
$ git fetch origin e17d916dbde584a4fd87049ec61f061869d942b5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/opam
 * [new ref]         e17d916dbde584a4fd87049ec61f061869d942b5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e17d916 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild