By "mount," I assumed you meant "get up on" and not "mountainous pun in the title of this blog." And by "olympic rings" I assume you meant "still rings" and not "the five interlocking rings on the official flag of the Olympic Games."
Basically, you want to figure out how to do this:
Please note: this image comes to us courtesy of my new favorite website, the Oldtime Strongman Blog. Find this and so many other exciting photos of oldtime strongmen at http://www.oldtimestrongman.com.
I cannot tell you how to be an oldtime strongman. I do not know any real oldtime strongmen. But I do know a real gymnast! Here is what our Special Gymnastics Correspondent tells us "how to mount olympic rings," Google friends!
well..... the real question is what do you mean by mount? if you mean how they get up to the rings... they get lifted by a coach. if by mount you mean what skill they do first.... there are about 300 different possibilities. or you could possibly mean how do they hold. in which case 98% of Olympians where grips on rings. so they would simply position their dowel over the ring. Basically i dont really know what you mean... Also might be beneficial to know that the rings look deceptively tall. I believe FIG rings are only about 8 feet tall. So mounting them really isnt much of an issue. hope this might kinda help.
It does kinda help, Special Gymnastics Correspondent! Or, I assume it does, at least. Let me know if you need any more help, Intrepid Googlers!**
*Don't Be Evil, Google!
**Please be sure and note that Google has also informed me that you can buy special gymnast insurance, tailored specifically to the needs of gymnasts! Google, you always know exactly what I need, even if I never knew it existed!