“karmanyeva adhikaraste` maa phaleshu kadhaachana” (You are entitled to do your karma (duty) unmindful of the result of your action since you have no control over that part)

But in the same vein the Gita stresses on the performing action or Karma in the following line of the same verse – maa they sanghotsva karmanee

So, Gita doesn’t advocate direction of your duty! Though it is not earthly possible to perform any act without focusing on corresponding fruits of your labor, you can still take a detached attitude so that you’ll not end up greatly disappointed when failure strikes!