そう言えばどうなんだろうと思ってやってみた

# freebsd-update fetch
Looking up update.FreeBSD.org mirrors... 3 mirrors found.
Fetching public key from update1.freebsd.org... done.
Fetching metadata signature for 13.0-RC3 from update1.freebsd.org... done.
Fetching metadata index... done.
Fetching 2 metadata files... done.
Inspecting system... done.
Preparing to download files... done.
Fetching 27 files... ....10....20... done.

WARNING: FreeBSD 13.0-RC3-p1 is approaching its End-of-Life date.
It is strongly recommended that you upgrade to a newer
release within the next 2 weeks.

すげえ　出来るみたいだ
前は「T1以外お断り」みたいな筈だったが