$ git clone -n https://src.fedoraproject.org/rpms/ghc-reducers.git /var/lib/mock/f31-build-116795-34581/root/chroot_tmpdir/scmroot/ghc-reducers
Cloning into '/var/lib/mock/f31-build-116795-34581/root/chroot_tmpdir/scmroot/ghc-reducers'...
$ git reset --hard 4a93690e24f3aa728333bcd884c64b18cf2c9055
HEAD is now at 4a93690 BR prof for lib and static for executable