gnomeos: Switch to using pseudo for commits
gnomeos: Switch to using pseudo for commits

This is noticeably faster.

One side effect here is that xattrs are empty, which is actually
a good thing.

resin-io/ostree,resin-io/ostree,GNOME/ostree,leandrosansilva/ostree,gatispaeglis/ostree,GNOME/ostree,gatispaeglis/ostree,gatispaeglis/ostree,resin-io/ostree,gatispaeglis/ostree,sujitfulse/ostree,sujitfulse/ostree,sujitfulse/ostree,sujitfulse/ostree,gatispaeglis/ostree,leandrosansilva/ostree,resin-io/ostree,resin-io/ostree,GNOME/ostree,gatispaeglis/ostree,sujitfulse/ostree,leandrosansilva/ostree,GNOME/ostree,leandrosansilva/ostree,leandrosansilva/ostree,GNOME/ostree