How to output git log with the first line only?

Question

I am trying to customize the format for git log. I want all commits to be shown in one line. Each line should only show the first line of the commit message.
I

Answer 1

if you only want the first line of the messages (the subject):

git log --pretty=format:"%s"

and if you want all the messages on this branch going back to master:

git log --pretty=format:"%s" master..HEAD

Last but not least, if you want to add little bullets for quick markdown release notes:

git log --pretty=format:"- %s" master..HEAD