Just a quick note sharing something I learnt recently. When migrating MCZ repos to git, set the commit-date of the first empty commit back past the first MCZ date. https://leewc.com/articles/making-past-git-commits/ After the MCZs have been exported, check the commit-date matches the author date. $ git log --format=fuller or otherwise force it so... $ git filter-branch --env-filter 'export GIT_COMMITTER_DATE="$GIT_AUTHOR_DATE"' cheers -ben