git-hash-object

Compute object hash

$ git hash-object [file]

$ git hash-object -w [file]

$ echo "[content]" | git hash-object --stdin

$ git hash-object -t [blob] [file]

git hash-object [options] [file...]

git hash-object computes the SHA-1 object ID for a file and optionally stores it in the Git object database. This low-level plumbing command exposes Git's internal object storage mechanism.
The command calculates the hash by formatting the file content as a Git object (with type and size header), then computing the SHA-1 hash. With the -w option, it also writes the object to .git/objects/, making it part of the repository even if not yet referenced by any commit. The --stdin option enables hashing content from pipes or scripts.

-w

Write object to database.

Read from stdin.

Object type (blob, commit, tree, tag).

Hash as if at path.

Don't apply filters.

git-cat-file(1), git-write-tree(1)