This hook can be used to prevent 'forced' update on certain refs by
making sure that the object name is a commit object that is a
descendant of the commit object named by the old object name.
-That is, to enforce a "fast forward only" policy.
+That is, to enforce a "fast-forward only" policy.
It could also be used to log the old..new status. However, it
does not know the entire set of branches, so it would end up
for the user.
The default 'update' hook, when enabled--and with
-`hooks.allowunannotated` config option turned on--prevents
+`hooks.allowunannotated` config option unset or set to false--prevents
unannotated tags to be pushed.
[[post-receive]]