$ git clone -n https://src.fedoraproject.org/rpms/rust-polyval.git /var/lib/mock/f40-build-2093211-50311/root/chroot_tmpdir/scmroot/rust-polyval
Cloning into '/var/lib/mock/f40-build-2093211-50311/root/chroot_tmpdir/scmroot/rust-polyval'...
$ git fetch origin 4aa3896f43ef94bd006b084704cad5cd35cafdb1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-polyval
 * [new ref]         4aa3896f43ef94bd006b084704cad5cd35cafdb1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4aa3896 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild