Package Requiring a Commit?

[Jai Flack]

Greetings Emacs Developers,

Is there a preferred way for a package to Package-Requires on an Emacs
version more recent than the latest release? The context for this my
package isearch-olc [1] which I would like to finish testing and submit
for inclusion in GNU ELPA soon, however it requires
lazy-count-update-hook which was only introduced in a recent-ish commit.

Is the preferred solution to check for special-variable-p and error
(possibly message on load and error on mode enable) if it hasn't been
defined yet?

[1] https://git.disroot.org/jflack/isearch-olc

-- 
Thanks,
Jai