$ git clone -n https://gitee.com/src-opencloudos-rpms/libidn2.git /var/lib/mock/dist-oc9-build-61483-16463/root/chroot_tmpdir/scmroot/libidn2
Cloning into '/var/lib/mock/dist-oc9-build-61483-16463/root/chroot_tmpdir/scmroot/libidn2'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/libidn2
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bb50aa7 import libidn2-2.3.4-3.tl4