throw error if tag/branch/commit doesn't exist, resolves #35
throw error if tag/branch/commit doesn't exist, resolves #35

riiiiizzzzzohmmmmm/meteorite,riiiiizzzzzohmmmmm/meteorite,aldeed/meteorite,riiiiizzzzzohmmmmm/meteorite,aldeed/meteorite,oortcloud/meteorite,aldeed/meteorite,oortcloud/meteorite,riiiiizzzzzohmmmmm/meteorite,oortcloud/meteorite