• 具体错误

git clone https://github.com/llvm/llvm-project.git
Cloning into 'llvm-project'...
remote: Enumerating objects: 6247187, done.
remote: Counting objects: 100% (5338/5338), done.
remote: Compressing objects: 100% (1922/1922), done.
error: RPC failed; curl 92 HTTP/2 stream 0 was not closed cleanly: CANCEL (err 8)
error: 5323 bytes of body are still expected
fetch-pack: unexpected disconnect while reading sideband packet
fatal: early EOF
fatal: fetch-pack: invalid index-pack output

• 解决办法

有人说换成HTTP，试了还是出错。

试试这个办法：

error: RPC failed； curl 18 transfer closed with outstanding read data remain-CSDN博客