Never mind the question about removing not my commits - I rediscovered the guix pull --rebase option, Pierre showed me previously.
There's also a problem - don't know if it's a bug or not, but Jami client encounters an error during screen sharing. I suspect it could be caused by the gnutls version in our repo - 3.6.9, whereas Jami developers told me the unpatched 3.6.10 should work finely. Is there anyone maintaining gnutls? I could try updating it, but for now I can't resolve some failing tests on 3.6.10 and I would like not to touch it at all, considering it is a really crucial for security package - I don't want to make the whole community vulnerable due to a stupid mistake I could make. Jan Wielkiewicz