running ./.git/hooks/validate.sh -v gives me
Assertion failed: Precondition: hash -v must have length 64.
Backtrace:
[1]: ./.git/hooks/timestamping : extract_token_from_commit line 200
[2]: ./.git/hooks/validate.sh : validate_commit line 97
[3]: ./.git/hooks/validate.sh : validate_commit_and_parents line 300
[4]: ./.git/hooks/validate.sh : main line 329
this commit fixes the issue