$ git clone -n https://src.fedoraproject.org/rpms/perl-Sereal-Decoder.git /var/lib/mock/f29-build-3971-980/root/thebuilddir/tmp/scmroot/perl-Sereal-Decoder
Cloning into '/var/lib/mock/f29-build-3971-980/root/thebuilddir/tmp/scmroot/perl-Sereal-Decoder'...
$ git reset --hard 5f4fd4254f5c29b5a22169815726edc5bc4f00a9
HEAD is now at 5f4fd42 - Rebuilt for https://fedoraproject.org/wiki/Fedora_28_Mass_Rebuild