This is mainly for my own personal use, as I use tachiyomi on multiple devices configured to auto update through fdroid, and this way I can update all plugins on all of them just by pushing once and initiating a check. If you intend to do so as well, please use https://tachi.efreakbnc.net/fdroid/repo
The non-tachi related apps are now located in another repo at https://nontachi.efreakbnc.net, but the tachiyomi forks are still here.
If you're only interested in a specific language and you're using an older device that likes to choke on a large fdroid database (one of my tablets takes forever to update the local database), there are per-language repos at: \1 \1 \1 \1 \1 \1 \1 \1 \1 \1 \1 \1 \1 \1 \1; these link to the repo, but the archives are also available. These repos are also not synced to github or tachi.efreakbnc.net - they are only on the tachi.cloud.efreakbnc.net mirror.
If I don't update fast enough for you and you'd like to take over the work, let me know and I'll give you the config.py and the keyfile and such. The script I use to update is update-tachi.sh.