$ git clone -n https://src.fedoraproject.org/rpms/sir.git /var/lib/mock/f29-build-6103-1500/root/thebuilddir/tmp/scmroot/sir
Cloning into '/var/lib/mock/f29-build-6103-1500/root/thebuilddir/tmp/scmroot/sir'...
$ git reset --hard 06b689af8713bc3b38217543e0df7d3d03f98fcb
HEAD is now at 06b689a - Rebuilt for https://fedoraproject.org/wiki/Fedora_28_Mass_Rebuild