$ git clone -n https://src.fedoraproject.org/rpms/ghc-rio-prettyprint.git /var/lib/mock/f41-build-side-1-2955628-35550/root/chroot_tmpdir/scmroot/ghc-rio-prettyprint
Cloning into '/var/lib/mock/f41-build-side-1-2955628-35550/root/chroot_tmpdir/scmroot/ghc-rio-prettyprint'...
$ git fetch origin 870436c485019504459d104a3f03bfde91f17eab:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-rio-prettyprint
 * [new ref]         870436c485019504459d104a3f03bfde91f17eab -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 870436c https://hackage.haskell.org/package/rio-prettyprint-0.1.8.0/changelog