$ git clone -n https://src.fedoraproject.org/rpms/ghc-rio-prettyprint.git /var/lib/mock/f39-build-1987753-43353/root/chroot_tmpdir/scmroot/ghc-rio-prettyprint
Cloning into '/var/lib/mock/f39-build-1987753-43353/root/chroot_tmpdir/scmroot/ghc-rio-prettyprint'...
$ git fetch origin a23b9f57132cbe5aeff90ab868b7f878646b5d3a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-rio-prettyprint
 * [new ref]         a23b9f57132cbe5aeff90ab868b7f878646b5d3a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a23b9f5 https://hackage.haskell.org/package/rio-prettyprint-0.1.4.0/changelog