$ git clone -n https://gitee.com/src-anolis-os/libxml2.git /var/lib/mock/dist-an8.8-build-299524-65890/root/chroot_tmpdir/scmroot/libxml2
Cloning into '/var/lib/mock/dist-an8.8-build-299524-65890/root/chroot_tmpdir/scmroot/libxml2'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/src-anolis-os/libxml2
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 72ff8e2 readme: add desc for branch