The current Guix package points to a Git commit that does not exist, which breaks the ability to build the package.
The current package version is '1.1.0-16.d3eee3c'. That commit d3eee3c [0] is the commit that updated the Guix package previously, to '1.1.0-15.03deb1e'. However, there is no commit 03deb1e [1]. I'm not sure exactly which contexts will hit this bug, but somebody on IRC had trouble: http://logs.guix.gnu.org/guix/2020-07-09.log#232819 Specifically, while trying to build '/gnu/store/igf09dzbik8id1bh9f0lahib6716fk81-guix-1.1.0-15.03deb1e-checkout', ... it failed with: "fatal: reference is not a tree: 03deb1e891b8a8b21888e5e047017fd6a3ea7a5f". [0] https://git.savannah.gnu.org/cgit/guix.git/commit/?id=d3eee3c0643a20ba06941ba45d9d27146a8b634d [1] https://git.savannah.gnu.org/cgit/guix.git/commit/?id=03deb1e
