$ git clone -n https://src.fedoraproject.org/rpms/which.git /var/lib/mock/f31-build-98579-33067/root/thebuilddir/tmp/scmroot/which
Cloning into '/var/lib/mock/f31-build-98579-33067/root/thebuilddir/tmp/scmroot/which'...
$ git reset --hard 6a8b4dd2295e4f1a4d45a987c9a3480b92b66c0d
HEAD is now at 6a8b4dd - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild