Comment by fsh

There is no direct evidence. Due to the experience with SARS-CoV-1 and fear of repercussions, farmers in China mass-culled susceptible animals before any testing could take place. However, SARS-CoV-1 was traced to palm civets, and both -1 and -2 seem to be very well adapted to small carnivores. So a fur/meat farm with civets, raccoon dogs, minks, or something like that is probably a good guess for the origin.