uname -v does not report an n-number

From: bob prohaska <fbsd_at_www.zefox.net>
Date: Wed, 20 Aug 2025 15:06:02 UTC 
I've an old Pi2 v1.1 which has been tracking -current for some time.

uname -v reports
bob@www:/usr/src % uname -v
FreeBSD 15.0-PRERELEASE #100 main-325e0b4c1a68: Mon Aug 18 15:23:41 PDT 2025     bob@www.zefox.org:/usr/obj/usr/src/arm.armv7/sys/GENERIC
bob@www:/usr/src % 

A newer install on a second Pi2 v1.1 reports:
# uname -v
FreeBSD 15.0-PRERELEASE #58 main-n279562-78537728efc5: Fri Aug 15 23:57:36 PDT 2025     bob@pelorus.zefox.org:/usr/obj/usr/src/arm.armv7/sys/GENERIC

Can the older machine be persuaded to display the sequence number?
Obviously I could reinstall, but I'm curious to see how long the
original installation can last. 

Thanks for reading,

bob prohaska