$ git clone -n https://src.fedoraproject.org/rpms/fcitx5.git /var/lib/mock/f40-build-2589574-62569/root/chroot_tmpdir/scmroot/fcitx5
Cloning into '/var/lib/mock/f40-build-2589574-62569/root/chroot_tmpdir/scmroot/fcitx5'...
$ git fetch origin 1a0907a952477ee483253a8e86a3b86adfb81ea3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fcitx5
 * [new ref]         1a0907a952477ee483253a8e86a3b86adfb81ea3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1a0907a update to upstream release 5.1.8