So I know this doesn't affect a lot of mirrors, but we have added snapshots of various EPEL releases to /pub/archive/epel. The current format will be /pub/archive/epel/<major_release>.<year_month_date_of_snapshot>/ and will be a hardlink copy of the data that is in /pub/epel/<major_release>. This will be done at 'regular' intervals in the future so that people who need to stick to an old version of epel packages can have a 'reliable' copy of the archives at that time.

Currently we have: lrwxrwxrwx. 1 root root 12 Apr 21 11:18 7 -> 7.2020-04-20 drwxr-xr-x. 7 ftpsync ftpsync 4096 May 29 2019 7.2019-05-29 drwxr-xr-x. 7 ftpsync ftpsync 4096 Apr 21 11:51 7.2020-04-20 lrwxrwxrwx. 1 root root 15 Apr 22 15:31 8 -> 8.1.2020-04-22/ drwxr-xr-x. 4 root root 4096 Apr 22 15:31 8.1.2020-04-22