title: Lerna Monorepo keeping individual git repos as packages
body: <p>In lerna, one can initialize git at the root level of the lerna project and inside the <code>packages</code> folder, we keep our small individual projects. Now suppose, you want to keep the git histories and commits of those packages isolated from each other. Because why do you wanna mix commit histories of un-related projects.
  Considering you're merging already existing two or more projects into a lerna project. Do we have no way but to remove the .git folder from those child packages since it introduces that messy git submodules concept into the picture? What's the cleaner way to enjoy monorepo benefits while keeping the git commit histories and workflows independent from each other for the children packages? Any example would be appreciated.</p>