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AhaBulb: Stuff Everyone Should Know · ahabulb.com/tech-git-commit-hash

What is the long hexadecimal code that names a Git commit?

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  1. A random serial number
  2. A hash-based object ID
  3. The date and time in hexadecimal

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References

  1. Pro Git book: What is Git? git-scm.com/book/en/v2/Getting-Started-What-is-Git%3F Checked 2026-10-10.
  2. Git hash function transition git-scm.com/docs/hash-function-transition Checked 2026-10-10.

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