$ git clone -n https://src.fedoraproject.org/rpms/ghc-NumInstances.git /var/lib/mock/f41-build-837449-159151/root/chroot_tmpdir/scmroot/ghc-NumInstances
Cloning into '/var/lib/mock/f41-build-837449-159151/root/chroot_tmpdir/scmroot/ghc-NumInstances'...
$ git reset --hard b8cf43541e84f71f66509255861927bd951156f4
HEAD is now at b8cf435 bump release