The new "repo" field in archive_args has been added since b612ee202a
(archive.c: avoid access to the_index - 2018-08-13). Use it instead of
hard coding the_repository.
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>