Update check-copyright-headers.rb so it can handle the first push to an
authorWard Vandewege <ward@curii.com>
Fri, 16 Jul 2021 18:05:22 +0000 (14:05 -0400)
committerWard Vandewege <ward@curii.com>
Fri, 16 Jul 2021 18:05:22 +0000 (14:05 -0400)
commitebf85170e71e15438a468f86e9aa3f5305d10341
treed5e2a282cf44ef82722ccd13512c9819c92c1b85
parentebe111f73372695ac4c52529d4346840763e1811
Update check-copyright-headers.rb so it can handle the first push to an
empty repository.

refs #17817

Arvados-DCO-1.1-Signed-off-by: Ward Vandewege <ward@curii.com>
git/hooks/check-copyright-headers.rb