Commit count and other project statistics are incorrect

The commit count on the project overview is incorrect (or slow to update).

Steps to reproduce

1. Create a new project
2. Add multiple commits adding new files via the interface
3. Note the commit count

Example Project

https://gitlab.com/jramsay/new-project-201803

What is the current bug behavior?

Commit count shows 1

What is the expected correct behavior?

Should show 7

Relevant logs and/or screenshots

Overview	Commits