Raffensperger seems to imply there is a way:
https://www.yahoo.com/gma/weve-never-found-systemic-fraud-145300107.html
"We've never found systemic fraud -- not enough to overturn the election. We have over 250 cases right now ... but right now we don't see anything that would overturn, you know, the will of the people here in Georgia," Raffensperger, a Republican, told ABC News Chief Anchor George Stephanopoulos during an interview on "This Week."
Maybe he meant this?
This past week, the president also began calling for a special session of the state legislature. The Washington Post reported Saturday that Trump called Gov. Brian Kemp that morning to urge him to do this and to try to convince members of the legislature to override the will of Georgia voters and appoint new electors who would support Trump over Biden. A spokesman for Kemp confirmed a call took place, but would not confirm this was a topic of conversation.
Kemp has already certified the state's electors for Biden and transmitted that certification to the National Archives, but he will have to do it again once the secretary's office re-certifies the election based on the results of the recount.
The only way to call a special session in Georgia is by the governor calling for it or by three-fifths of the both chambers of the General Assembly agreeing to call one. In mid-November, the governor, in a statement co-signed by the speaker of the state House and the lieutenant governor, indicated this wouldn't happen.