$ git clone -n https://src.fedoraproject.org/rpms/rust-err-derive.git /var/lib/mock/f38-build-side-43-rust-devel-1416611-31457/root/chroot_tmpdir/scmroot/rust-err-derive
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1416611-31457/root/chroot_tmpdir/scmroot/rust-err-derive'...
$ git fetch origin abec76638bc12df8a61e94ef423fe7b1ad0c8e2e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-err-derive
 * [new ref]         abec76638bc12df8a61e94ef423fe7b1ad0c8e2e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at abec766 Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild