sysupgrade(8) on OpenBSD
The text 955d8c16857f, as OpenBSD 7.0, OpenBSD 6.9, OpenBSD 6.8, OpenBSD 6.7, OpenBSD 6.6 shipped it.
upgrade system to the next release or a new snapshot
Flags it lists
-
-f -
-k -
-n -
-r -
-s