If you are shooting RAW, no it shouldnt matter, but I would always have it on the larger color space just in case I am wrong.
Theoretically RAW is EVERYTHING that the sensor can record. But that information has to be assigned a color space in order for you to see the image. In the case of the jpg/preview that you get on the back of the camera, that is srgb. If the RAW color space is assigned in camera, which I dont believe it is, it matters, or if it is assigned in post when you import it into LR, AA, or ACameraRaw it doesnt matter.
All the best-