$ git clone -n https://src.fedoraproject.org/rpms/ghc-haskell-gi.git /var/lib/mock/f38-build-side-42-init-devel-1055413-29765/root/chroot_tmpdir/scmroot/ghc-haskell-gi
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1055413-29765/root/chroot_tmpdir/scmroot/ghc-haskell-gi'...
$ git fetch origin 766ff3cc9aa3fa908f213827c52fbd0ddd7428b4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-haskell-gi
 * [new ref]         766ff3cc9aa3fa908f213827c52fbd0ddd7428b4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 766ff3c https://hackage.haskell.org/package/haskell-gi-0.26.4/changelog