So what does 'parent' actually mean? If Bitcoin does not have any parent and those coins 'forked' it, why you assume those 62 repos are 'parent'? Can you give the names of these parents?
The "parent fork" is intended as repo mostly used to create new cryptocurrency but different than bitcoin, for example: PIVX, Ethereum, Monero and so on..
I cannot include the full list of this parent because it is in an evolving stage.
the problem with your approach is that you can't call a coin that is already a copy of another coin, "parent". for example litecoin is a copy of bitcoin that forked bitcoin's code. then Dogecoin is a copy of litecoin that forked litecoin. you can't call litecoin parent of Dogecoin because it is a copy coin itself. bitcoin is still the parent of both of them.