The idea was that there was no proof Russians were behind the hacks/leaks -- the DNC didn't turn over the server for analysis, moronic and easily proven false claims that files couldn't be transfered over the internet as fast as 180 mbps (lol) -- and thus it was a phony narrative created to smear Trump.
The fact that the indictments outline all kinds of evidence of these Russians committing the hacks and leaks, completely unrelated to any data found on the DNC server, makes it utterly astounding that they are still trying to claim there is something shady about DNC not turning over the server. This is aside from the fact that these people don't seem to understand that the mirror they DID turn over is by definition 100% identical to the original server, unless the argument is that there would have been the culprit's fingerprints or pubes on the original hard drive or something.