Merge branch '419905_fix_ref_extraction_for_sha256' into 'master'

Extend ref extraction logic to support SHA256 commits

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/144853



Merged-by: Tianwen Chen <tchen@gitlab.com>
Approved-by: Tianwen Chen <tchen@gitlab.com>
Approved-by: Gavin Hinfey <ghinfey@gitlab.com>
Reviewed-by: Vasilii Iakliushin <viakliushin@gitlab.com>
Reviewed-by: Tianwen Chen <tchen@gitlab.com>
Co-authored-by: Vasilii Iakliushin <viakliushin@gitlab.com>