$ git clone -n https://src.fedoraproject.org/rpms/haskell-platform.git /var/lib/mock/f41-build-side-1-3132625-39663/root/chroot_tmpdir/scmroot/haskell-platform
Cloning into '/var/lib/mock/f41-build-side-1-3132625-39663/root/chroot_tmpdir/scmroot/haskell-platform'...
$ git fetch origin b763b8828e729c690c746c1c392edda04d4fa3c3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/haskell-platform
 * [new ref]         b763b8828e729c690c746c1c392edda04d4fa3c3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b763b88 persistent-template is a meta-package