Howto upgrade manually added packages in reprepro repositories?

I've successfully created a Debian repository wiht reprepro by adding deb files manually with: reprepro --ask-passphrase -V includedeb jessie /tmp/debs/*.deb Now I revived new versions of the debs by the upstream. The upstream does not provide a repository. This is why I want to build my own. My question is: How to update the packages in my repository with new versions?