By default the git log will display commits from the parent branch as well as the current branch. Just like all git commands, this is meant to be a reasonable default which you can configure to suit your needs.

What I have found most useful is to show commits between two commits. What this means is that the following will display commits from the current branch only:

git log master..wip

Equally simple is showing commits made today:

git log —since=yesterday

There are a few other options related to date ranges and authors which I encourage you to check out the help file:

git help log