Refactored blog post: Could not find commit error

Caused by Technical debt: The blog post class is bloated (#20180 - closed)

An issue with not being able to find a commit.

See stack trace on ops:

https://ops.gitlab.net/gitlab-org/release/tools/-/jobs/19196739

More investigation needed. Details will be added as comments below 👇

Exit criteria

• Cause identified from investigation OR
• Technical debt: Monitor Blog Post refactoring work (#21451 - closed) is closed