Apostate

The Apostate was a starship owned by the bounty hunter Nik Hepho. While Hepho was searching for adherents of the Church of the Force in Jedha City on the moon Jedha in the year 0 BBY, the ship hovered in orbit above, operated by a droid intelligence that waited for the hunter to make contact via his backpack-mounted long-range transmitter.

Behind the scenes
The Apostate was first mentioned in the reference book Star Wars: Rogue One: The Ultimate Visual Guide, which was written by Pablo Hidalgo and released on December 16, 2016.