Somewhat quiet commit output in Git

Question

If I run "git commit", Git will output a lot of detailed information about the commit:

$ git commit -m 'Daily update.'
[master bb56ea6] Daily update.
1477 files changed, 183898 insertions(+), 8 deletions(-)
rewrite GTD/Email.ods (72%)
create mode 120000 [etc.]
$

If I run "git commit -q", Git will output nothing:

$ git commit -m 'Daily update.'
$

Is there an option to get "git commit" to output just the first line,
giving the commit hash, like this:

$ git commit -m 'Daily update.'
[master bb56ea6] Daily update.
$

Answer 1

Cheat?
git commit -m 'Daily commit' | head -n 1

Answer 2

I would do

git commit -q -m 'Daily commit' && git rev-parse HEAD

.
It's two calls, but the second one specifically designed to get the latest commit ID.

A possible downside is that if the repository is shared in some way (say, it's on a networked share) then there's a possible race between these adjacent calls to the git binary -- another developer is able
to update the HEAD (or a branch it points to) in the meantime.