$ git clone -n https://src.fedoraproject.org/rpms/rust-block-buffer0.9.git /var/lib/mock/f38-build-side-43-rust-devel-1417050-31458/root/chroot_tmpdir/scmroot/rust-block-buffer0.9
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1417050-31458/root/chroot_tmpdir/scmroot/rust-block-buffer0.9'...
$ git fetch origin 09fe1cd59f9324b608ba6fede15048a74c01e961:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-block-buffer0.9
 * [new ref]         09fe1cd59f9324b608ba6fede15048a74c01e961 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 09fe1cd Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild