If you google Amnesia Haze that has won Cannabis Cups most results send you back to Soma Seeds.
I don't know what kind of information you are looking for specifically but there's no lack of info on that strain, it's been around and grown for 20 years.
"Whenever we got a new craze in the weed world, Soma does his own take on it, like SoGouda when Cheese arrived, well Somas Amnesia Haze is his similar thing, it bears no relation to the HyPro/Moppel/Core Amnesia clone
Somas version is classic Sativa, all woody type aromas, whereas the Amnesia Clone is distinctively lemony, in a slightly over mature style, not fresh/zingy, really easy to tell apart. The clone is stronger and yields better, also has way more bag appeal and is now an internationally known standard. Overproduced,it has actually dropped in price in Holland because of her success
The original clone was found in a pack of old Greenhouse Super Silver Haze, according to what Mr HyPro told MrHaze and others, originally. .."
Then there's this from IC