$ git clone -n https://src.fedoraproject.org/rpms/bcd.git /var/lib/mock/f40-build-2274502-55013/root/chroot_tmpdir/scmroot/bcd
Cloning into '/var/lib/mock/f40-build-2274502-55013/root/chroot_tmpdir/scmroot/bcd'...
$ git fetch origin 5d54b51b24f894800f8b93e2ac931f206c8a817a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/bcd
 * [new ref]         5d54b51b24f894800f8b93e2ac931f206c8a817a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5d54b51 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild