$ git clone -n https://src.fedoraproject.org/rpms/rust-tabled.git /var/lib/mock/f38-build-side-42-init-devel-1395877-31050/root/chroot_tmpdir/scmroot/rust-tabled
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1395877-31050/root/chroot_tmpdir/scmroot/rust-tabled'...
$ git fetch origin 4bb811200ca1ca574dc1513b57e590a72d10885a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-tabled
 * [new ref]         4bb811200ca1ca574dc1513b57e590a72d10885a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4bb8112 Disable example that requires unshipped file