$ git clone -n https://src.fedoraproject.org/rpms/gtk-xfce-engine.git /var/lib/mock/f31-build-50767-27434/root/chroot_tmpdir/scmroot/gtk-xfce-engine
Cloning into '/var/lib/mock/f31-build-50767-27434/root/chroot_tmpdir/scmroot/gtk-xfce-engine'...
$ git reset --hard 5e21d64b51c445d4337ff04ea57ccd6913492750
HEAD is now at 5e21d64 - Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild