nixguix: Make nar cli consistent with guix hash cli interface
This also fixes complaints about short variable names.
$ guix hash -S nar -f base32 -H sha256 -x guix-modules bd4jxucj7hqpvjv5646rxehevbia6gnym7y4kebj4cm3eugdwpma $ python -m nar -f base32 -H sha256 guix-modules it6djhqnacibff47lh43haq2bnu3w6pus72chbx4gjmzl2tppkda==== $ rm -rf guix-modules/.git # because it's ignored by defaut by guix $ python -m nar -f base32 -H sha256 guix-modules bd4jxucj7hqpvjv5646rxehevbia6gnym7y4kebj4cm3eugdwpma====
Related to T4538#93319