Fedora image repository

Hello all,

getting a forbidden error when trying to perform an update.

~% sudo dnf update
Fedora RISC-V Koji                                            114  B/s | 199  B     00:01
Errors during downloading metadata for repository 'fedora-riscv-koji':
  - Status code: 403 for https://openkoji.iscas.ac.cn/repos/f38-build-side-42-init-devel/31010/riscv64/repodata/repomd.xml (IP: 218.2.156.170)
Error: Failed to download metadata for repo 'fedora-riscv-koji': Cannot download repomd.xml: Cannot download repodata/repomd.xml: All mirrors were tried
Ignoring repositories: fedora-riscv-koji
Dependencies resolved.
Nothing to do.
Complete!

can anyone help?