A recent commit means that the very useful tool ag recognizes --org as an option to let you search just Org files.
Ag: https://github.com/ggreer/the_silver_searcher
It'll take a while for that to make its way into package updates on different operating systems, but it's good news.
Bill
--
William Denton :: Toronto, Canada --- Listening to Art: https://listeningtoart.org/
https://www.miskatonic.org/ --- GHG.EARTH: http://ghg.earth/
Caveat lector. --- STAPLR: http://staplr.org/