Merge branch 'sb/submodule-misc-cleanups'

Minor simplification. * sb/submodule-misc-cleanups: submodule update: make use of the existing fetch_in_submodule function

Junio C Hamano committed Jun 20, 2016 at 11:01 UTC de76eb69d2359f4820b120e49be9a30067bb5d3b

No changes.