Related: <a href="https:&#x2F;&#x2F;git-scm.com&#x2F;book&#x2F;en&#x2F;v1&#x2F;Git-Internals-Git-Objects" rel="nofollow">https:&#x2F;&#x2F;git-scm.com&#x2F;book&#x2F;en&#x2F;v1&#x2F;Git-Internals-Git-Objects</a> (and other sections in that chapter)