$ git clone -n https://gitee.com/uestc-cheng/libxml2_29469.git /var/lib/mock/dist-an8.8-build-299775-65890/root/chroot_tmpdir/scmroot/libxml2_29469
Cloning into '/var/lib/mock/dist-an8.8-build-299775-65890/root/chroot_tmpdir/scmroot/libxml2_29469'...
$ git fetch origin 6b6549be2c7201057f031706b4b3f217f3e69ec1:KOJI_FETCH_HEAD
From https://gitee.com/uestc-cheng/libxml2_29469
 * [new ref]         6b6549be2c7201057f031706b4b3f217f3e69ec1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6b6549b CVE-2023-29469