次のようなコードで確認した
(add-hook 'org-capture-prepare-finalize-hook
(lambda ()
(message (format "prepare: %s"
(buffer-name (current-buffer))))))
(add-hook 'org-capture-before-finalize-hook
(lambda ()
(message (format "before: %s"
(buffer-name (current-buffer))))))
(add-hook 'org-capture-after-finalize-hook
(lambda ()
(message (format "after: %s"
(buffer-name (current-buffer))))))
結果
prepare: CAPTURE-.notes before: CAPTURE-.notes Wrote /Users/sximada/.notes after: current.org