git subrepo clone (merge) --branch=b0b63615fc2c7a30470fc1ac31ffdc18fdf4518b https://github.com/libretro/stella-libretro.git cores/atari2600

subrepo:
  subdir:   "cores/atari2600"
  merged:   "b0b63615f"
upstream:
  origin:   "https://github.com/libretro/stella-libretro.git"
  branch:   "b0b63615fc2c7a30470fc1ac31ffdc18fdf4518b"
  commit:   "b0b63615f"
git-subrepo:
  version:  "0.4.0"
  origin:   "git@github.com:ingydotnet/git-subrepo.git"
  commit:   "74339e8"