$ git clone -n https://src.fedoraproject.org/rpms/fcitx5.git /var/lib/mock/f39-build-1563043-37470/root/chroot_tmpdir/scmroot/fcitx5
Cloning into '/var/lib/mock/f39-build-1563043-37470/root/chroot_tmpdir/scmroot/fcitx5'...
$ git fetch origin 62106f33700f98f01516c885ba0c10094ad57954:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fcitx5
 * [new ref]         62106f33700f98f01516c885ba0c10094ad57954 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 62106f3 update to upstream release 5.1.3