$ git clone -n https://src.fedoraproject.org/rpms/mesa-demos.git /var/lib/mock/f31-build-51877-27566/root/chroot_tmpdir/scmroot/mesa-demos
Cloning into '/var/lib/mock/f31-build-51877-27566/root/chroot_tmpdir/scmroot/mesa-demos'...
$ git reset --hard a0ecd6c6e4bb5d20ec3147d58cff0391e653833c
HEAD is now at a0ecd6c - Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild