# normal add
git submodule add -b master --name api/oss-proto https://github.com/go-cinch/oss-proto.git ./api/oss-proto
# or force add
git submodule add -f -b master --name api/oss-proto https://github.com/go-cinch/oss-proto.git ./api/oss-proto
git submodule update --force --recursive --init --remote