fetch from pkg.freebsd.org fails: Not Implemented

Hi,

For a little tool (https://www.klop.ws/pkgstats/pkg-age.html) I regularly fetch some data from the pkg servers.
Since a day or two I get spurious errors. I added -vv to my fetch command and got this output.

Apparently the server sends HTTP 501 status code. And fetch exits with "Not Implemented".


scheme:   "https"
+user:     ""
+password: ""
+host:     "pkg.freebsd.org"
+port:     "0"
+document: "/FreeBSD:13:amd64/quarterly/data.pkg"
+---> pkg.freebsd.org:443
+resolving server address: pkg.freebsd.org:443
+SSL options: 82004850
+Peer verification enabled
+Using OpenSSL default CA cert file and path
+Verify hostname
+TLSv1.3 connection established using TLS_AES_128_GCM_SHA256
+Certificate subject: /CN=pkg.freebsd.org
+Certificate issuer: /C=US/O=Certainly/CN=Certainly Intermediate R1
+requesting https://pkg.freebsd.org/FreeBSD:13:amd64/quarterly/data.pkg
+>>> GET /FreeBSD:13:amd64/quarterly/data.pkg HTTP/1.1
+If-Modified-Since: Tue, 06 Jan 2026 15:22:51 GMT
+>>> If-Modified-Since: Tue, 06 Jan 2026 15:22:51 GMT
+>>> Host: pkg.freebsd.org
+>>> Accept: */*
+>>> User-Agent: fetch libfetch/2.0
+>>> Connection: close
+>>>
+<<< HTTP/1.1 501 First fragment: unexpected status code

+<<< Connection: close

+<<< Content-Length: 0

+<<< Via: 1.1 varnish, 1.1 varnish

+content length: [0]
+<<< ETag: "695d28cb-a3e396"

+<<< Age: 0

+<<< Accept-Ranges: bytes

+<<< Date: Fri, 09 Jan 2026 14:04:04 GMT

+<<< X-Served-By: cache-rtm-ehrd2290047-RTM

+<<< X-Cache: MISS

+<<< X-Cache-Hits: 0

+<<< X-Timer: S1767967444.984756,VS0,VE111

+<<< Cache-Control: no-cache,no-store,max-age=0

+<<<

+offset 0, length -1, size -1, clength 0
+fetch: https://pkg.freebsd.org/FreeBSD:13:amd64/quarterly/data.pkg: Not Implemented



The fetch in the script worked fine for about a year.
Does this ring a bell to anybody?

Regards,
Ronald.