$ git clone -n https://gitee.com/sys0613/libXfixes.git /var/lib/mock/dist-an23-build-273637-64217/root/chroot_tmpdir/scmroot/libXfixes
Cloning into '/var/lib/mock/dist-an23-build-273637-64217/root/chroot_tmpdir/scmroot/libXfixes'...
$ git fetch origin c5709b00e60ead1ad0c430214ff5c4d2c6698d92:KOJI_FETCH_HEAD
From https://gitee.com/sys0613/libXfixes
 * [new ref]         c5709b00e60ead1ad0c430214ff5c4d2c6698d92 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c5709b0 add doc sub package