What are some alternatives?
When comparing Gitql and pre-commit by Yelp, you can also consider the following products
GitStats - A local GitHub-like contributions calendar
GitKraken - The intuitive, fast, and beautiful cross-platform Git client.
GVfs - Git Virtual File System (by Microsoft)
Git-Repo - Manage Gitlab, GitHub and Bitbucket from the command line
Working Copy - The powerful Git client for iOS
Gitential - Analytics for Git Repositories