$ git clone -n https://src.fedoraproject.org/rpms/btbuilder.git /var/lib/mock/f31-build-56230-28202/root/thebuilddir/tmp/scmroot/btbuilder
Cloning into '/var/lib/mock/f31-build-56230-28202/root/thebuilddir/tmp/scmroot/btbuilder'...
$ git reset --hard bdf5b2315e1f102f18c0d838fef4dd3c262ae7c1
HEAD is now at bdf5b23 Rebuilt for Boost 1.69