themes/docsy/layouts/partials/page-meta-lastmod.html

{{ if and (.GitInfo) (.Site.Params.github_repo) -}}
<div class="text-muted mt-5 pt-3 border-top">
  {{ T "post_last_mod" }} {{ .Lastmod.Format .Site.Params.time_format_default -}}
  {{ with .GitInfo }}: {{/* Trim WS */ -}}
    <a href="{{ $.Site.Params.github_repo }}/commit/{{ .Hash }}">
      {{- .Subject }} ({{ .AbbreviatedHash }}) {{- /* Trim WS */ -}}
    </a>
  {{- end }}
</div>
{{ end -}}