$ git clone -n https://src.fedoraproject.org/rpms/byacc.git /var/lib/mock/f31-build-71896-30800/root/thebuilddir/tmp/scmroot/byacc
Cloning into '/var/lib/mock/f31-build-71896-30800/root/thebuilddir/tmp/scmroot/byacc'...
$ git reset --hard 3c8cbc82a4f23d1fb7f97992a949a58c6afad19a
HEAD is now at 3c8cbc8 - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild