You could try this magnet link:
magnet:?xt=urn:btih:8e7b532944745eef2658b6e49823b32b5b361750&dn=musicbrainz-server-2016-12-20.ova&tr=udp%3a%2f%2fmgtracker.org%3a6969%2fannounce&tr=udp%3a%2f%2ftracker.openbittorrent.com%3a80%2fannounce&tr=udp%3a%2f%2ftracker.publicbt.com%3a80%2fannounce
The link (eventually) worked for me, opened in Firefox. I did have to wait for a few minutes, but Firefox was showing the tab as working all the while.
Er, the link in your comment isn’t actually a link, so I’m unsure which one you are referring to. However, ftp://vm.musicbrainz.org/pub/musicbrainz-vm/musicbrainz-server-2016-12-20.ova.torrent does seem to be working now. I’ll make copies of it in various other places, so if that goes down again, it can be gotten that way. (edit: I haven’t been able to find anywhere to mirror it. The fact that it isn’t accessible via http prevents the Wayback Machine from mirroring it, and the fact that it isn’t an image prevents me from uploading it to the forum. I haven’t checked whether the wiki also bans uploading torrents… This is rather frustrating.)
Actually, it is: «[The link](ftp://vm.musicbrainz.org/pub/musicbrainz-vm/musicbrainz-server-2016-12-20.ova.torrent)» – just for whatever reason Discourse doesn’t transform ftp:// links into actual links(?), and I didn’t realise until your comment.
Edit: I changed the allowed link URL schemes to include “ftp”. ftp:// links should now work too, and the link in that post might eventually works as well. (I tried rebuilding its HTML, but that didn’t seem to have an immediate effect.)