It doesn't state the letters RMRK explicitly and I believe he is using the ticker for shorthand. But the company is definitely the one mentioned in this excert:
As of March 27, 2017, the Company agreed to fund up to $300,000 to settle outstanding convertible debt of and accounts payable by and on behalf of Rimrock Gold Corp. (“Rimrock”), for the ultimate acquisition of Rimrock, a currently inactive public company located in Las Vegas, Nevada.
If you can find me another Rimrock Gold Corp. located in Las Vegas, Nevada then you might be on to something.