net/gitup began to fail

I successfully used port net/gitup to update ports tree. Suddenly it began
to fail. I deleted /usr/ports and told gitup to clone it - same error
(on both my hosts - workstation and VPS):

~ # gitup -c ports
# Host: git.freebsd.org
# Port: 443
# Repository Path: /ports.git
# Target Directory: /usr/ports
# Want: 10584ee144da9593c353e500874e0683bcc2833f
# Branch: main
gitup: process_command: read failure:

HTTP/1.1 200 OK
Server: nginx/1.28.3
Date: Thu, 07 May 2026 04:36:33 GMT
Content-Type: application/x-git-upload-pack-result
Transfer-Encoding: chunked
Connection: keep-alive
Expires: Fri, 01 Jan 1980 00:00:00 GMT
Pragma: no-cache
Cache-Control: no-cache, max-age=0, must-revalidate
0011shallow-info
0001000dpackfile
00052004PACK
: Invalid argument
~ #

Debug with "-v 3" doesn't show more info.
14.4-RELEASE-p3 amd64.