See

• https://github.com/MichalMaruska/git-hierarchy
• https://github.com/MichalMaruska/git-hierarchy-go

More parts might be done natively, instead of invoking `git' More care is necessary to sync the state after such invocations.

might try using git2 with "vendored-libgit2"

2-step downcasting from a trait object:

• Any ... type-erasure? as_any produces Any.... and that has vtable, which...
• from Any ....allows to downcast<>

OnceCell

Cannot pass Reference:

move occurs because segment._start has type git2::Reference<'_>, which does not implement the Copy trait cannot move out of segment._start which is behind a shared reference