$ git clone -n https://gitee.com/src-opencloudos-rpms/libtiff.git /var/lib/mock/dist-oc8-build-228873-81246/root/chroot_tmpdir/scmroot/libtiff
Cloning into '/var/lib/mock/dist-oc8-build-228873-81246/root/chroot_tmpdir/scmroot/libtiff'...
$ git fetch origin 49686a4041b466478bb0533e149cf72f993d12e8:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/libtiff
 * [new ref]         49686a4041b466478bb0533e149cf72f993d12e8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 49686a4 import libtiff-4.0.9-35.tl3