From NavCan.
TSB Report#A17F0159: C-FKCK, an Airbus 320-200 aircraft operated by Air Canada, was conducting flight ACA759 from Toronto, ON (CYYZ) to San Francisco, CA (KSFO). As the aircraft was on a visual approach to Runway 28R at KSFO, ATC cleared ACA759 to land. Approximately 0.6 nautical mile from the runway threshold, the flight crew asked ATC to confirm the landing clearance for Runway 28R because they were seeing lights. ATC responded in the affirmative, and re-cleared ACA759 to land on Runway 28R. The controller was coordinating with another facility when a flight crew member from another airline taxiing on Taxiway C queried ATC as to where ACA759 was going, then stated that ACA759 appeared to be lined up with Taxiway C which parallels Runway 28R. ACA759 had overflown Taxiway C for approximately 0.25 miles when ATC instructed the aircraft to go around. Four aircraft were positioned on Taxiway C at the time of the event. It is estimated that ACA759 overflew the first two aircraft by 100 feet, the third one by 200 feet and the last one by 300 feet. The closest lateral proximity between ACA759 and one of the four aircraft on Taxiway C was 29 feet. The NTSB is investigating.
UPDATE: FAA Report: The following information was reported by FAA Washington Operations Centre: On July 7 at 23:56 PST (July 8 2017 at 02:56 EDT) Air Canada flight 759, an Airbus A320 from Toronto (CYYZ) to San Francisco (KSFO) was cleared to land runway 28R and instead line up for Taxiway C which is parallel to the runway. The aircraft overflew United 1 and Philippine Airlines 115 by 100 feet, United 863 by 200 feet and United 1118 by 300 feet before being issued a go around by Air Traffic Control.