git clone --mirror fails

[xiota]

Description

I am unable to clone this repository with git clone --mirror. Upon running the command, I see the following output:

Cloning into bare repository 'llvm-project.git'...

Followed by no output or network activity for a long time. Then the following error:

error: RPC failed; HTTP 408 curl 18 HTTP/2 stream 7 was reset
fatal: expected 'packfile'

git clone and git clone --bare appear to work as expected.

git works as expected on a fork of the repository with the "Copy the main branch only" option unchecked. (Potential solution, replace repository with a fresh fork.)

Steps to reproduce

Run: git clone --mirror https://github.com/apple/llvm-project.git

Expected behavior

git should clone the repository.

Note: Same issue with different repository apple/swift#66168