first "merge": https://git.kernel.org/pub/scm/git/git.git/commit/?id=33deb6...
first "tag": https://git.kernel.org/pub/scm/git/git.git/commit/?id=bf0c6e...
first "branch": https://git.kernel.org/pub/scm/git/git.git/commit/?id=74b242...
first Linus "branch" commit: https://git.kernel.org/pub/scm/git/git.git/commit/?id=e69a19...