./ scripts/feeds update can't succeed

[Mangoandermao]

Updating feed 'packages' from 'git://git.openwrt.org/feed/packages.git^78bcd00c13587571b5c79ed2fc3363aa674aaef7' ...
正克隆到 './feeds/packages'...
fatal: 远端在初始连接时即挂断
failed.
Updating feed 'luci' from 'git://git.openwrt.org/project/luci.git^fe09ab990256d8b63e76cc1ab2435baef921b8b4' ...
正克隆到 './feeds/luci'...
fatal: 远端意外挂断了
failed.
Updating feed 'routing' from 'git://git.openwrt.org/feed/routing.git^a0d61bddb3ce4ca54bd76af86c28f58feb6cc044' ...

Sonmetimes,the process is in a suspended state，do nothing。

[zuowei8]

because we need upload source into github, so we remove .git folder from feeds packages, if you need update them, you may remove the feeds fodler and packgage/feeds fodler, then run "./scripts/feeds update -a" and "./scripts/feeds install -a"