Finding commits since last release

So.. I frequently find myself writing release notes for the sub-project I'm working on at $dayjob when the whole project/platform is deployed and this is how I can quickly scan what work was done :

git log --stat --grep='SubProject/Branchname' LastReleaseTag..HEAD | less

Having commit comment conventions makes it simple to track only manual comments and skip merges etc.. i.e.

subprojectA: fix bug 2342 foo bar missing