$ git clone -n https://src.fedoraproject.org/rpms/zerofree.git /var/lib/mock/f31-build-61309-28849/root/chroot_tmpdir/scmroot/zerofree
Cloning into '/var/lib/mock/f31-build-61309-28849/root/chroot_tmpdir/scmroot/zerofree'...
$ git reset --hard b9db1a096f46d530a8e84081d11bc1a9608896d6
HEAD is now at b9db1a0 - Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild