$ git clone -n https://src.fedoraproject.org/rpms/rust-polyval.git /var/lib/mock/f40-build-2326679-58841/root/chroot_tmpdir/scmroot/rust-polyval
Cloning into '/var/lib/mock/f40-build-2326679-58841/root/chroot_tmpdir/scmroot/rust-polyval'...
$ git fetch origin d74278f23dbdd22836082523554419f985d8f1cd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-polyval
 * [new ref]         d74278f23dbdd22836082523554419f985d8f1cd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d74278f Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild