$ git clone -n https://src.fedoraproject.org/rpms/ghc-monad-par.git /var/lib/mock/f38-build-side-42-init-devel-1042817-29760/root/chroot_tmpdir/scmroot/ghc-monad-par
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1042817-29760/root/chroot_tmpdir/scmroot/ghc-monad-par'...
$ git fetch origin 3b229c37f7335e479c6a600f4f26b778d377941d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-monad-par
 * [new ref]         3b229c37f7335e479c6a600f4f26b778d377941d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3b229c3 Convert to %autorelease and %autochangelog