$ git clone -n https://src.fedoraproject.org/rpms/ghc-arrows.git /var/lib/mock/f38-build-side-42-init-devel-726931-27330/root/chroot_tmpdir/scmroot/ghc-arrows
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-726931-27330/root/chroot_tmpdir/scmroot/ghc-arrows'...
$ git fetch origin 29f1b2823c529078f109317309face3344f81451:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-arrows
 * [new ref]         29f1b2823c529078f109317309face3344f81451 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 29f1b28 Convert to %autorelease and %autochangelog