$ git clone -n https://src.fedoraproject.org/rpms/ghc-gio.git /var/lib/mock/f40-build-2095174-50372/root/chroot_tmpdir/scmroot/ghc-gio
Cloning into '/var/lib/mock/f40-build-2095174-50372/root/chroot_tmpdir/scmroot/ghc-gio'...
$ git fetch origin eac1d8940c1715321f7ca780908fd66308bd269a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-gio
 * [new ref]         eac1d8940c1715321f7ca780908fd66308bd269a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at eac1d89 https://hackage.haskell.org/package/gio-0.13.10.0/changelog