在github上克隆phpredis扩展源码时报以下错误错：
Cloning into ‘phpredis’…
remote: Counting objects: 8999, done.
remote: Compressing objects: 100% (23/23), done.
Receiving objects: 37% (3333/8999), 2.14 MiB | 5.00 KiB/s
error: RPC failed; result=18, HTTP code = 200 | 7.00 KiB/s
fatal: The remote end hung up unexpectedly
fatal: early EOF
fatal: index-pack failed
开始以为是网络延迟问题，后经查阅资料，发现是克隆大文件问题造成的，
git config –global http.postBuffer 524288000
增加500兆的缓存后，再次克隆成功了