git rev-list --pretty=format:"" issue

git 1.8.2.1 on OSX(Mountain Lion) installed with Homebrew

I am seeing an issue when trying to format the output from rev-list command.
git log --pretty=format:"%H - %an, %ar : %s" When I attempt the above
string, instead of printing to the shell, LESS is opened and the
output is displayed there.


Got the command from here:
http://git-scm.com/book/en/Git-Basics-Viewing-the-Commit-History

git log --pretty=format:"%h - %an, %ar : %s" The string above works
fine when I change the %h to %H the issue shoes up.