It is highly unlikely that fogging will kill the virus causing Coronavirus. It’s possible that it will knock down some of the airborne particles, but it will certainly not sterilize the contaminated hard surfaces. Source removal is critical, which would involve cleaning all surfaces with a registered EPA product, according to the instructions. Many instructions involve leaving the chemical on surfaces “visibly wet” for up to 10 minutes.
In order to clean for SARS-CoV2, a company must be HAZWOPER-40 trained by OSHA, and use the appropriate chemicals in the manner specified on the label (which won’t be fogging).