unless you can get a clone of OG, i would suggest master. Any seeds claiming to be the real OG are fake.
Why? Is OG Kush non-reproductive?
I was living with a fairly regular supply of OG at one point, in the long long ago. On rare occasion I would find an egg or three in a bag and I collected them. Who's to say I couldn't get a seed crop from that, are they inherently femininized? OG doesn't seem like it was crossed with ditchweed
There are a lot of seedbanks selling seeds with a California origin - if we can get their seeds, do you not think they can get ours?
Maybe you've got a good reason for saying they're fake, but I'm hoping they're not. I have my eye on a couple of diesel strains and I don't want to go through the effort and find that they're bunk.