libnm doesn't use dbus-glib or dbus at all.
%package libnm
Summary: Libraries for adding NetworkManager support to applications (new API).
Group: Development/Libraries
-Requires: dbus >= %{dbus_version}
-Requires: dbus-glib >= %{dbus_glib_version}
%description libnm
This package contains the libraries that make it easier to use some NetworkManager
Requires: %{name}-libnm%{?_isa} = %{epoch}:%{version}-%{release}
Requires: glib2-devel
Requires: pkgconfig
-Requires: dbus-glib-devel >= %{dbus_glib_version}
%description libnm-devel
This package contains the header and pkg-config files for development applications using