Partial commit sha searches yield no results

In reference to: gitlab-foss#24833 (closed)

WORKS: https://gitlab.com/search?project_id=13083&scope=commits&search=448c19a DOESN'T WORK: https://gitlab.com/search?project_id=13083&scope=commits&search=448c

Expected_ https://gitlab.com/search?project_id=13083&scope=commits&search=448c produces at the very least the same result as https://gitlab.com/search?project_id=13083&scope=commits&search=448c19a and possibly more if any commit sha's contain the search value