osx man page for git-get-tar-commit-id

GIT-GET-TAR-COMMI(1)						    Git Manual						      GIT-GET-TAR-COMMI(1)

NAME
       git-get-tar-commit-id - Extract commit ID from an archive created using git-archive

SYNOPSIS
       git get-tar-commit-id

DESCRIPTION
       Read a tar archive created by git archive from the standard input and extract the commit ID stored in it. It reads only the first 1024
       bytes of input, thus its runtime is not influenced by the size of the tar archive very much.

       If no commit ID is found, git get-tar-commit-id quietly exists with a return code of 1. This can happen if the archive had not been created
       using git archive or if the first parameter of git archive had been a tree ID instead of a commit ID or tag.

GIT
       Part of the git(1) suite

Git 2.17.1							    10/05/2018						      GIT-GET-TAR-COMMI(1)