$ git clone -n https://src.fedoraproject.org/rpms/nullmodem.git /var/lib/mock/f31-build-48111-27016/root/chroot_tmpdir/scmroot/nullmodem
Cloning into '/var/lib/mock/f31-build-48111-27016/root/chroot_tmpdir/scmroot/nullmodem'...
$ git reset --hard 476c1d4258f68c882b09121c6300758b02ace5d3
HEAD is now at 476c1d4 - Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild