Oh-my-zsh deletes output of successful command with "FAIL: 141"

My Oh-my-zsh does the following: 1. When I run the git log --pretty --oneline command, it shows me a long list of commits, as expected. 2. As soon as I hit q, it suddenly disappears with the below output:

$ git log --pretty --oneline
    FAIL: 141

Why is this happening, and how do I fix it?