$ git clone -n https://src.fedoraproject.org/rpms/mantle.git /var/lib/mock/f31-build-86008-31646/root/chroot_tmpdir/scmroot/mantle
Cloning into '/var/lib/mock/f31-build-86008-31646/root/chroot_tmpdir/scmroot/mantle'...
$ git reset --hard 6678c7a68aa483b6829137f8c1a8b2daece3b8d3
HEAD is now at 6678c7a - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild