$ git clone -n https://gitee.com/src-opencloudos-rpms/libtracefs.git /var/lib/mock/dist-oc8-build-74951-51806/root/chroot_tmpdir/scmroot/libtracefs
Cloning into '/var/lib/mock/dist-oc8-build-74951-51806/root/chroot_tmpdir/scmroot/libtracefs'...
$ git fetch origin b4b6bcbe3683c601fe41d5e468315f8327841be2:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/libtracefs
 * [new ref]         b4b6bcbe3683c601fe41d5e468315f8327841be2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b4b6bcb import libtracefs-1.3.1-3.tl3