CommitHashes
CommitHashes are the unique identifiers assigned to commits in a version control history. They are generated by applying a cryptographic hash function to the commit's contents and metadata, producing a fixed-length string that serves as a fingerprint for that commit. The hash guarantees integrity: any change to the commit's tree, parent, author/committer data, or message changes the hash, effectively breaking references to the original commit.
In Git, each CommitHash is a 40-character hexadecimal string produced by the SHA-1 algorithm. The hash is
References to commits can use full or abbreviated hashes. Abbreviations are typically short (for example, the
Properties and considerations: commits form a directed acyclic graph via parent pointers; hashes are not guaranteed