$ git clone -n https://src.fedoraproject.org/rpms/ghc-gi-gobject.git /var/lib/mock/f39-build-1992549-43416/root/chroot_tmpdir/scmroot/ghc-gi-gobject
Cloning into '/var/lib/mock/f39-build-1992549-43416/root/chroot_tmpdir/scmroot/ghc-gi-gobject'...
$ git fetch origin f52d290914f8aedfd8eb4d61e676cce58657bfe5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-gi-gobject
 * [new ref]         f52d290914f8aedfd8eb4d61e676cce58657bfe5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f52d290 https://hackage.haskell.org/package/gi-gobject-2.0.30/changelog