$ git clone -n https://src.fedoraproject.org/rpms/ghc-gi-gtk.git /var/lib/mock/f40-build-777533-129389/root/chroot_tmpdir/scmroot/ghc-gi-gtk
Cloning into '/var/lib/mock/f40-build-777533-129389/root/chroot_tmpdir/scmroot/ghc-gi-gtk'...
$ git fetch origin 810e7cdcc9879f923a9750cc2353ce77e5420338:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-gi-gtk
 * [new ref]         810e7cdcc9879f923a9750cc2353ce77e5420338 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 810e7cd https://hackage.haskell.org/package/gi-gtk-3.0.41/changelog