openwrt 各个版本代码下载
trunk：
git clone git://github.com/openwrt/openwrt.git
15.05 (Chaos Calmer)
git clone -b chaos_calmer git://github.com/openwrt/openwrt.git
14.07 (Barrier Breaker)
git clone -b barrier_breaker git://github.com/openwrt/openwrt.git
12.09 (Attitude Adjustment)
git clone -b attitude_adjustment git://github.com/openwrt/openwrt.git
lede相关
17.01 （稳定版）
git clone -b lede-17.01 https://git.lede-project.org/source.git
lede-trunk
git clone https://github.com/lede-project/source.git