$ git clone -n https://src.fedoraproject.org/rpms/crystal-stacker.git /var/lib/mock/f31-build-67099-29986/root/chroot_tmpdir/scmroot/crystal-stacker
Cloning into '/var/lib/mock/f31-build-67099-29986/root/chroot_tmpdir/scmroot/crystal-stacker'...
$ git reset --hard d509b40ecd818fd61752a939fba6f44ed63f5fdb
HEAD is now at d509b40 - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild