$ git clone -n https://src.fedoraproject.org/rpms/fcitx5-unikey.git /var/lib/mock/f42-build-3346765-45002/root/chroot_tmpdir/scmroot/fcitx5-unikey
Cloning into '/var/lib/mock/f42-build-3346765-45002/root/chroot_tmpdir/scmroot/fcitx5-unikey'...
$ git fetch origin b9e8177e9706328b044737aaac8e6c6fc6b9e32b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fcitx5-unikey
 * [new ref]         b9e8177e9706328b044737aaac8e6c6fc6b9e32b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b9e8177 update to upstream release 5.1.6