$ git clone -n https://src.fedoraproject.org/rpms/nnpack.git /var/lib/mock/f41-build-856432-167612/root/chroot_tmpdir/scmroot/nnpack
Cloning into '/var/lib/mock/f41-build-856432-167612/root/chroot_tmpdir/scmroot/nnpack'...
$ git fetch origin 48290483667e45dc3c0db9227b926f1f76eea7c2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/nnpack
 * [new ref]         48290483667e45dc3c0db9227b926f1f76eea7c2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4829048 Disable aarch64