github: fatal: unable to access 'https://github.com/chatchat-space/Langchain-Chatchat.git/': Failed to connect to github.com port 443 after 21090 ms: Couldn't connect to server

国内无法直接使用 git clone xxx

改为其他友好网站克隆如：

git clone https://ghproxy.com/github.com/AUTOMATIC1111/stable-diffusion-webui.git # 在github上拉取项目

git clone https://ghclone.com/github.com/chatchat-space/Langchain-Chatchat.git
ghproxy.com
gitclone.com