$ git clone -n https://src.fedoraproject.org/rpms/xnnpack.git /var/lib/mock/f40-build-788508-135185/root/chroot_tmpdir/scmroot/xnnpack
Cloning into '/var/lib/mock/f40-build-788508-135185/root/chroot_tmpdir/scmroot/xnnpack'...
$ git fetch origin fbe01e735f11a6519aed80be56d4bbb010684d73:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xnnpack
 * [new ref]         fbe01e735f11a6519aed80be56d4bbb010684d73 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fbe01e7 Fix broken arm build