$ git clone -n https://git.cclinux.org/stage/rpms/mesa-demos /var/lib/mock/dist-circle8-build-13980-2939/root/chroot_tmpdir/scmroot/mesa-demos
Cloning into '/var/lib/mock/dist-circle8-build-13980-2939/root/chroot_tmpdir/scmroot/mesa-demos'...
warning: redirecting to https://git.cclinux.org/stage/rpms/mesa-demos.git/
$ git reset --hard fba3734d2f32e5b09ef51a6e565203ca8b8190c9
HEAD is now at fba3734 import mesa-demos-8.4.0-5.20181118git1830dcb.el8