$ git clone -n https://src.fedoraproject.org/rpms/nwchem.git /var/lib/mock/f39-build-1997007-43957/root/chroot_tmpdir/scmroot/nwchem
Cloning into '/var/lib/mock/f39-build-1997007-43957/root/chroot_tmpdir/scmroot/nwchem'...
$ git fetch origin e9612f96b6fe43313427b647a175608c35df1cc0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/nwchem
 * [new ref]         e9612f96b6fe43313427b647a175608c35df1cc0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e9612f9 New upstream release