When fetching ofn commit, if it is not found, return a sentinal value to avoid a wayward git push
When fetching ofn commit, if it is not found, return a sentinal value to avoid a wayward git push

MikeiLL/openfoodnetwork,ltrls/openfoodnetwork,levent/openfoodnetwork,mkllnk/openfoodnetwork,folklabs/openfoodnetwork,Em-AK/openfoodnetwork,folklabs/openfoodnetwork,openfoodfoundation/openfoodnetwork,KosenkoDmitriy/openfoodnetwork,openfoodfoundation/openfoodnetwork,RohanM/openfoodnetwork,Em-AK/openfoodnetwork,lin-d-hop/openfoodnetwork,openfoodfoundation/openfoodnetwork,openfoodfoundation/openfoodnetwork,Em-AK/openfoodnetwork,oeoeaio/openfoodnetwork,RohanM/openfoodnetwork,KosenkoDmitriy/openfoodnetwork,KosenkoDmitriy/openfoodnetwork,stveep/openfoodnetwork,MikeiLL/openfoodnetwork,ltrls/openfoodnetwork,KateDavis/openfoodnetwork,Em-AK/openfoodnetwork,RohanM/openfoodnetwork,stveep/openfoodnetwork,lin-d-hop/openfoodnetwork,levent/openfoodnetwork,RohanM/openfoodnetwork,stveep/openfoodnetwork,mkllnk/openfoodnetwork,KosenkoDmitriy/openfoodnetwork,Matt-Yorkley/openfoodnetwork,levent/openfoodnetwork,lin-d-hop/openfoodnetwork,mkllnk/openfoodnetwork,folklabs/openfoodnetwork,oeoeaio/openfoodnetwork,oeoeaio/openfoodnetwork,MikeiLL/openfoodnetwork,oeoeaio/openfoodnetwork,Matt-Yorkley/openfoodnetwork,KateDavis/openfoodnetwork,Matt-Yorkley/openfoodnetwork,mkllnk/openfoodnetwork,ltrls/openfoodnetwork,lin-d-hop/openfoodnetwork,KateDavis/openfoodnetwork,levent/openfoodnetwork,folklabs/openfoodnetwork,stveep/openfoodnetwork,MikeiLL/openfoodnetwork,KateDavis/openfoodnetwork,ltrls/openfoodnetwork,Matt-Yorkley/openfoodnetwork