$ git clone -n https://src.fedoraproject.org/rpms/m1n1.git /var/lib/mock/f40-build-2609839-63827/root/chroot_tmpdir/scmroot/m1n1
Cloning into '/var/lib/mock/f40-build-2609839-63827/root/chroot_tmpdir/scmroot/m1n1'...
$ git fetch origin a8f40234a962c2944348533843c5a6ad8d59a404:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/m1n1
 * [new ref]         a8f40234a962c2944348533843c5a6ad8d59a404 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a8f4023 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild