$ git clone -n https://src.fedoraproject.org/rpms/darktable.git /var/lib/mock/f39-build-1652400-40498/root/chroot_tmpdir/scmroot/darktable
Cloning into '/var/lib/mock/f39-build-1652400-40498/root/chroot_tmpdir/scmroot/darktable'...
$ git fetch origin 837b3af23082219791911f631438b8806be38b87:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/darktable
 * [new ref]         837b3af23082219791911f631438b8806be38b87 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 837b3af remove appdata.patch