$ git clone -n https://gitee.com/uestc-cheng/libxml2.git /var/lib/mock/dist-an8.8-build-299510-65890/root/chroot_tmpdir/scmroot/libxml2
Cloning into '/var/lib/mock/dist-an8.8-build-299510-65890/root/chroot_tmpdir/scmroot/libxml2'...
$ git fetch origin 5a0f39eeea92b0676882d4cb67f873fdc4f88c5b:KOJI_FETCH_HEAD
From https://gitee.com/uestc-cheng/libxml2
 * [new ref]         5a0f39eeea92b0676882d4cb67f873fdc4f88c5b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5a0f39e update libxml2-2.9.7-CVE-2023-29469.patch.