repo-security-scanner is described as 'CLI tool that finds secrets accidentally committed to a git repo, eg passwords, private keys' and is an app in the Development category. There are eight alternatives to repo-security-scanner for Mac, Windows, Linux, Self-Hosted solutions and SaaS. The best alternative is GitGuardian. It's not free, so if you're looking for a free alternative, you could try Repo-supervisor or yara4pentesters. Other great apps like repo-security-scanner are truffleHog (Free, Open Source), AWS Lab's git-secrets (Free, Open Source), Gitleaks (Free, Open Source) and Yelp's detect-secrets (Free, Open Source).
GitGuardian is a cybersecurity startup solving the issue of secrets sprawling through source code, a widespread problem that leads to some credentials ending up in compromised places or even in the public space.
It happens sometimes that you can commit secrets or passwords to your repository by accident. The recommended best practice is not commit the secrets, that's obvious. But not always that obvious when you have a big merge waiting to be reviewed.