The wrapper was named "gut". I don't recall all the details so the names below are approximate. It wrapped the git command and added project-specific options (like --first-parent) to existing git commands, introduced new ones (like "gut check" which ran the build and tests), or hid native git command which were discouraged (like rebase).

"gut sync" merged in all the changes from the branch's parent into a single child branch, fetching if appropriate. We never got around to automating sequential syncing since the CI setup was weak in this project.

"gut create" created a new cascaded branch with the necessary tracking information from an arbitrary parent branch.

"gut review" posted the cascaded branch to the code review system so the diff would turn out correct.

"gut pdiff" would show the diff of the branch relative to the merge-base of the parent.

"gut reparent" would change the parent of a branch.

"gut insert" would insert a new cascaded branch between two existing branches -- useful for inserting refactors earlier in the series.

"gut merge" which merged the branch into the parent only once various checks, like review approval and passing tests and being at the head of the stack, were satisfied.