devdocs/assets/stylesheets/pages/_git.scss

._git {
  padding-left: 1rem;

  > h1,
  > h2,
  > .reference-menu,
  > .callout,
  > h1 + .sectionbody {
    margin-left: -1rem;
  }

  > h2 { @extend %block-heading; }
  h3 { font-size: 1rem; }

  > .callout,
  > h1 + .sectionbody {
    @extend %note, %note-green;
  }

  code { @extend %label; }
  em { font-style: normal; }
}