执行pod update 报错error: RPC failed； curl 18 transfer closed with outstanding read data remainin
执行pod update 或pod repo update 都会失败提示：
error: RPC failed; curl 18 transfer closed with outstanding read data remaining
fatal: the remote end hung up unexpectedly
fatal: early EOF
fatal: index-pack failed
解决方法：
修改postBuffer的默认值
git config --global http.postBuffer 524288000
确认修改
git config --list