$ git clone -n https://src.fedoraproject.org/rpms/perl-X11-GUITest.git /var/lib/mock/f29-build-3659-939/root/thebuilddir/tmp/scmroot/perl-X11-GUITest
Cloning into '/var/lib/mock/f29-build-3659-939/root/thebuilddir/tmp/scmroot/perl-X11-GUITest'...
$ git reset --hard 391fcc8f18726fb69df27e2a7dc82b9debf7ab1c
HEAD is now at 391fcc8 - Rebuilt for https://fedoraproject.org/wiki/Fedora_28_Mass_Rebuild