find all forks with changes of a given github project -

i'm looking on abandoned github project has more 300 forks. of them identical, without changes introduced after forking. there way filter changes have been made? alternatively, sort "similarity" original project.

not directly: list forks, and, each ones, use event api list push events:

any push event more recent last push event on original repo means fork has potentially seen changes. can sort forks number of recent push events sense of "similarity".