$ git clone -n https://src.fedoraproject.org/rpms/rust-sha1_smol.git /var/lib/mock/f38-build-side-43-rust-devel-1417682-31459/root/chroot_tmpdir/scmroot/rust-sha1_smol
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1417682-31459/root/chroot_tmpdir/scmroot/rust-sha1_smol'...
$ git fetch origin fe1c3e3af20cb9668be5d90272e731b0bde55e73:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-sha1_smol
 * [new ref]         fe1c3e3af20cb9668be5d90272e731b0bde55e73 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fe1c3e3 Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild