[Pathogen-David]

I've not used it extensively, but Josh can probably help here.

https://github.com/josh-project/josh

It's designed for making multiple Git repos from a monorepo, but I think you should be able to make a skeleton repo that represents your desired final monorepo layout and push your individual repos to the Josh subviews of that repo to combine them all.

(A big advantage of this approach over the multiple unrelated histories is that you don't have the mass move commits since Josh will rewrite all history as if the files were always in that folder, so you don't have to worry about history of individual files getting broken.)

[chrschilling]

You don't even need to make a skeleton repo first. By passing `-o merge` as extra option on the push to a non existing view, the merging of unrelated histories will be done by the server. See: https://github.com/josh-project/josh/issues/596