git-clone(1) after base 3e8619e535b6 for /usr/ports subdirectories

[Graham Perrin]

With recent installations of FreeBSD-CURRENT, traditional use of git no 
longer works for /usr/ports.

----
root@sixteen:~ # git clone --depth 1 https://git.freebsd.org/ports.git 
/usr/ports

fatal: destination path '/usr/ports' already exists and is not an empty 
directory.
root@sixteen:~ # freebsd-version -kru ; uname -mvKU

16.0-CURRENT
16.0-CURRENT
16.0-CURRENT
FreeBSD 16.0-CURRENT #0 main-n283549-6d37c3db62ba: Mon Feb  2 12:11:20 
UTC 2026 
 r...@releng3.nyi.freebsd.org:/usr/obj/usr/src/amd64.amd64/sys/GENERIC 
amd64 1600011 1600011
root@sixteen:~

----

<https://freebsdfoundation.org/enhance-your-git-experience/> (bcr)

<https://docs.freebsd.org/en/books/handbook/ports/#ports-using-git-method>

<https://github.com/freebsd/freebsd-src/commit/3e8619e535b61c99f0dc50cc6c7e237eb82a8be7> 
| 
<https://cgit.FreeBSD.org/src/commit/?id=3e8619e535b61c99f0dc50cc6c7e237eb82a8be7>