$ git clone -n https://src.fedoraproject.org/rpms/ast.git /var/lib/mock/f29-build-5284-1264/root/thebuilddir/tmp/scmroot/ast
Cloning into '/var/lib/mock/f29-build-5284-1264/root/thebuilddir/tmp/scmroot/ast'...
$ git reset --hard 53ec9bbca9ba3efa2d0f1c87e8ad2ecdfe4f09e6
HEAD is now at 53ec9bb - Rebuilt for https://fedoraproject.org/wiki/Fedora_28_Mass_Rebuild