Add guard to keep commits count from having a NoMethodError

Gary Holtzrequested to merge
576241-opening-merge-request-returns-500-error-with-nomethoderror-undefined-method-for-nil-nilclass into master

What does this MR do and why?

This MR should keep the 500 error from happening that was mentioned in #576241 (closed). The bigger problem (large number of commits) is still there, but it will no longer error out.

Related to #576241 (closed)

Edited by Gary Holtz

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