$ git clone -n https://src.fedoraproject.org/rpms/vrpn.git /var/lib/mock/f31-build-55290-28110/root/chroot_tmpdir/scmroot/vrpn
Cloning into '/var/lib/mock/f31-build-55290-28110/root/chroot_tmpdir/scmroot/vrpn'...
$ git reset --hard b78d1418c64f46346108d7b45f131eed5aba71ef
HEAD is now at b78d141 Rebuild (jsoncpp)