$ git clone -n https://src.fedoraproject.org/rpms/rust-primal.git /var/lib/mock/f40-build-2093237-50312/root/chroot_tmpdir/scmroot/rust-primal
Cloning into '/var/lib/mock/f40-build-2093237-50312/root/chroot_tmpdir/scmroot/rust-primal'...
$ git fetch origin 978ffcc2e65d8f774a60d0877803da0ec3469c82:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-primal
 * [new ref]         978ffcc2e65d8f774a60d0877803da0ec3469c82 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 978ffcc Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild