$ git clone -n https://src.fedoraproject.org/rpms/fcitx5-chewing.git /var/lib/mock/f41-build-848604-164498/root/chroot_tmpdir/scmroot/fcitx5-chewing
Cloning into '/var/lib/mock/f41-build-848604-164498/root/chroot_tmpdir/scmroot/fcitx5-chewing'...
$ git fetch origin 586c23426d43271db9ef42041ae56fd3bc12ad7c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fcitx5-chewing
 * [new ref]         586c23426d43271db9ef42041ae56fd3bc12ad7c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 586c234 update to upstream release 5.1.4