can't install with pod

[leewaycn]

because I am in the wall(built by the great PRC) ?how can I fix that .

[!] Error installing libwebp
[!] /usr/bin/git clone https://chromium.googlesource.com/webm/libwebp /var/folders/5v/nwy8rsn57gv54vswtjbx1_sr0000gn/T/d20180405-24822-1tunis3 --template= --single-branch --depth 1 --branch v0.5.0

Cloning into '/var/folders/5v/nwy8rsn57gv54vswtjbx1_sr0000gn/T/d20180405-24822-1tunis3'...
fatal: unable to access 'https://chromium.googlesource.com/webm/libwebp/': Failed to connect to chromium.googlesource.com port 443: Operation timed out