mrhlpr: add support for GNOME SSH origin
GNOME's SSH endpoints areof the form git@ssh.gitlab.gnome.org:GNOME/Incubator/papers.git and without this patch, the host could not be found
GNOME's SSH endpoints areof the form git@ssh.gitlab.gnome.org:GNOME/Incubator/papers.git and without this patch, the host could not be found