git checkout origin/master -- api/routes.tsgit checkout BranchB
git merge BranchA[submodule "externals/shopify_revfluence"]
path = externals/shopify_revfluence
url = [email protected]:Revfluence/shopify_python_api.git
> git rm externals/shopify_revfluencegit submodule add --force https://github.com/Shopify/shopify_python_api.git externals/shopify_revfluence