cp 0-sandbox-o11y.php ~/public_html/wp-content/mu-plugins/
Edit ~/public_html/wp-content/mu-plugins/0-sandbox.php and add a sandbox_log_request( 1 ); statement.
cp hook.diff /tmp/
cd ~/public_html
patch -p1 < /tmp/hook.diff
Be careful not to commit changes to wp-includes/class-wp-hook.php! You can
reverse them with git checkout HEAD wp-includes/class-wp-hook.php.