$ git clone -n https://src.fedoraproject.org/rpms/ghc-haskell-gi.git /var/lib/mock/f39-build-1918550-42935/root/chroot_tmpdir/scmroot/ghc-haskell-gi
Cloning into '/var/lib/mock/f39-build-1918550-42935/root/chroot_tmpdir/scmroot/ghc-haskell-gi'...
$ git fetch origin ce5e21dc6fd70e6e60e08f257c42b70898aba99b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-haskell-gi
 * [new ref]         ce5e21dc6fd70e6e60e08f257c42b70898aba99b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ce5e21d https://hackage.haskell.org/package/haskell-gi-0.26.7/changelog