sudo /bin/bash -c "$(curl -fsSL https://install.jiatan.cn)"

What could possibly go wring?

The author really hates the Proxmox enterprise repo sources.list.d file, he deletes it several times ('rm -rf') at least in 2 files

Always review scripts before running, regardless of origin, Github isn't always safe.

The domain redirects to github due to the changing commit hash raw URL.

You also have to cross-check the 4 kexts checksum with the origin in the OpenCore ISO, including binaries in other projects like OSX-KVM. Thankfully there are no binaries that require reproducible build setup.

I always try to read the source script before running it, unless it’s something I trust highly (brew, for example or tteck scripts in the case of PVE). Even then, I read some of them just to see what it does under the hood.