redhat: fix typo and make the output more silent for dist-git sync

The addition of gitlab centos dist-git sync added a typo, plus the dist-git check about the GL_DISTGIT_USER setting was verbose, make it silent now.

This is a cherry-pick of same change already done for kernel-ark.

Signed-off-by: Herton R. Krzesinski herton@redhat.com