Capture an org-mode stored link. Add it to the kill-ring in a format suitable for use as a version control commit message.

org-capture-link.el

(defun custom-org-kill-link-as-commit-message ()
  "Capture a stored link. Add it to the kill ring in a format
  suitable for use as a version control commit message."

  (interactive)
  (call-interactively 'org-store-link)
  (let ((link (car org-stored-links)))
    ;; A link is a (list URL DESCRIPTION)
    (kill-new (concat (cadr link) "\n" (car link) "\n"))
    (setq org-stored-links (cdr org-stored-links))))

(defun customize-org-mode ()
  (local-set-key "\C-c\M-l" 'custom-org-kill-link-as-commit-message))

(add-hook 'org-mode-hook 'customize-org-mode)