$ git clone -n https://src.fedoraproject.org/rpms/ghc-control-monad-free.git /var/lib/mock/f31-build-99768-33202/root/thebuilddir/tmp/scmroot/ghc-control-monad-free
Cloning into '/var/lib/mock/f31-build-99768-33202/root/thebuilddir/tmp/scmroot/ghc-control-monad-free'...
$ git reset --hard b2f127069f77e2363e6969f9d7a9a1162bd9c2b6
HEAD is now at b2f1270 BR prof for lib and static for executable