$ git clone -n https://gitee.com/opencloudos-stream/libgit2.git /var/lib/mock/dist-ocs23-build-25295-1191/root/chroot_tmpdir/scmroot/libgit2
Cloning into '/var/lib/mock/dist-ocs23-build-25295-1191/root/chroot_tmpdir/scmroot/libgit2'...
$ git fetch origin HEAD:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/libgit2
 * [new ref]                    -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5b21007 update