$ git clone -n https://src.fedoraproject.org/rpms/python-pynn.git /var/lib/mock/f40-build-781393-131566/root/chroot_tmpdir/scmroot/python-pynn
Cloning into '/var/lib/mock/f40-build-781393-131566/root/chroot_tmpdir/scmroot/python-pynn'...
$ git fetch origin e447f230d1eaa42aa0a759be1cae9c78af04eaa0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-pynn
 * [new ref]         e447f230d1eaa42aa0a759be1cae9c78af04eaa0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e447f23 fix: add patch to fix nest extensions (fixes rh#2263339, rh#2241443)