$ git clone -n https://src.fedoraproject.org/rpms/OpenEXR_Viewers.git /var/lib/mock/f29-build-3503-915/root/thebuilddir/tmp/scmroot/OpenEXR_Viewers
Cloning into '/var/lib/mock/f29-build-3503-915/root/thebuilddir/tmp/scmroot/OpenEXR_Viewers'...
$ git reset --hard dfd6d5f79c599ad3f90550f79a920218750568ef
HEAD is now at dfd6d5f - Rebuilt for https://fedoraproject.org/wiki/Fedora_28_Mass_Rebuild