96b1cb97ba
rm -rf build/* was to start rpm building on clean state, but it also delete scylla built binaries so it was not good idea. Instead of rm -rf build/*, we can check file existance on cloned directory, if it seems good we can reuse it. Also we need to run git pull on each package repo since it may not included latest commit. Fixes #4189 Signed-off-by: Takuya ASADA <syuu@scylladb.com> Message-Id: <20190206101755.2056-1-syuu@scylladb.com>