Ernest Grosjean (1844 - 1936) published "Pièces pour orgue ou harmonium", a set of 56 pieces in two volumes, in 1902. The first volume contains 33 easy pieces, that can be played without the use of pedals. As far as I know, "bref" means "short". So this is a short offertoire. Though it's not really that much shorter than other offertoires by Grosjean. The only registration indication Grosjean gives is "Grand jeu". To add a little variation in my performance I make it a play across three mmanuals.
Score available here: http://partitura.org/index.php/ernest-grosjean-offertoire-bref