A company really wouldn't at least ask what the contributions were? What kind of 'competitive market' is it where you can lie so easily and get away with it?
When we hire people I usually check out the Person's github account and see for myself what the contributions were. For me it's more of a hint "these forked repos are worth a look". But that's because we are a small startup and everyone in the hiring pipeline knows how to use github. I can easily imagine that you can get some of the early filters in larger companies with meaningless OSS contributions because the people involved at that stage lack the knowledge or time to verify.