fix base on initial commits

[bobidle]

Description:

• On initial commits of a GitHub repository all commits (part of the initial commit) should be checked
• Trufflehog should work when the Trufflehog workflow is part of an initial commit
• Trufflehog should work when it is part of a GitHub repository template (again part of an initial commit)

Fix #3557

Checklist:

• Tests passing (make test-community)?
• Lint passing (make lint this requires golangci-lint)?

[CLAassistant]

All committers have signed the CLA.

[bobidle]

Rebased with main branch

[zricethezav]

A step in the right direction, there might be some additional edge cases here to iron out.