Support installing from a specific commit

[thii]

This can be done by removing the dependency on Mint.

[thii]

Failing builds and logs:

• swift brew install pvieito/PythonKit@0b2ffa2db8d249112cc833a6e13faac004ce5835
  https://app.bitrise.io/build/e6a3736a41698299#?tab=log
• swift brew install IBDecodable/IBGraph@122412ba45f234740c6cbebccbdaff0d1995e525
  https://app.bitrise.io/build/a1398125f53d0191#?tab=log
• swift brew install apple/swift-format@03fb1bd7386d5427464df3e9b4c42ef3fa2f1758
  https://app.bitrise.io/build/1a1057482d71ed53#?tab=log