New comment by Hoshpak on void-packages repository

https://github.com/void-linux/void-packages/issues/12817#issuecomment-508927324
Comment:
The alpha.de. mirror was down for some time and manual intervention was necessary to get it back up. Luckily it's back now and it should be stable for the foreseeable future. So that was the first issue. The second is that xbps looks for x86_64 repodata in the `aarch64` and `musl` directories. There isn't any there so it reports the reposync error. You can ignore that since it already found the correct repodata in the `current` directory and will use that.

I'm glad it worked out for you in the end and will close this issue now.