Re: [PATCH v2 0/3] sample hooks: become hash agnostic

Denton Liu [off-list ref] writes:

There are currently two hooks that have hardcoded 40 zeros as the null
OID and, thus, are not hash-agnostic. Rewrite these to get the zero OID using

	git hash-object --stdin </dev/null | tr '[0-9a-f]' '0'

so that the zero OID is hash-agnostic.

This was initially done by introducing `git rev-parse --null-oid` to get the
zero OID but that seems like overkill. From a cursory search of Github, the
only instances of the zero OID being used come from clones of the git.git
repository (tests and sample hooks). Since we don't want to introduce an option
that no one will use, don't go this route and just do the easiest thing.

Patches 2&3/3 look quite sensible.

Patch 1/3 is a borderline Meh, as we do not need to force _our_
coding convention to the end-users, even though we do do so on
ourselves.  But let's take it to make things more consistent.

Thanks.