When I write the commit message we add the sign-off part so most of our commits follow this pattern:

Do some stuff (message no longer than 50 chars)

Longer description that possibly has more than 1 line
containing explanation (optional, we add it just in case
the first line is not enough to understand what's
happening.

Signed-off-by: Igor Popov <igor.popov@napa.fi>

See Tim Pope's post regarding good commit messages.

GitHub also shows just the first line... Could you also make it like this for Stash? It would certainly make it less cluttered and would promote better practices.

And it doesn't seem hard to implement.