$ git clone -n https://src.fedoraproject.org/rpms/xnnpack.git /var/lib/mock/f41-build-781159-13559/root/chroot_tmpdir/scmroot/xnnpack
Cloning into '/var/lib/mock/f41-build-781159-13559/root/chroot_tmpdir/scmroot/xnnpack'...
$ git fetch origin 6009b94655c69b399ede899e6023dcfad6d16b98:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xnnpack
 * [new ref]         6009b94655c69b399ede899e6023dcfad6d16b98 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6009b94 Missing from checkin