$ git clone -n https://src.fedoraproject.org/rpms/rust-owning_ref.git /var/lib/mock/f40-build-2642649-66465/root/chroot_tmpdir/scmroot/rust-owning_ref
Cloning into '/var/lib/mock/f40-build-2642649-66465/root/chroot_tmpdir/scmroot/rust-owning_ref'...
$ git fetch origin d13cfc664eadcca1af600bdb6f803d583f086978:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-owning_ref
 * [new ref]         d13cfc664eadcca1af600bdb6f803d583f086978 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d13cfc6 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild