Hi @rovertsnikle , when checking out a repo’s state via the git-clone Step, the Step uses different checkout strategies based on factors like git hosting provider, incoming git event type, etc.
Depending on the concrete git checkout method different git history is available and you might need to fetch extra information from the repository to be able to determine the merge-base commit.
I would need to look into one of your builds to be able to provider more concrete help, please either attach on of your build’s URL, or contact us on our Support channel.