$ git clone -n https://gitee.com/opencloudos-stream/byacc.git /var/lib/mock/dist-ocs23-base-build-269168-25836/root/chroot_tmpdir/scmroot/byacc
Cloning into '/var/lib/mock/dist-ocs23-base-build-269168-25836/root/chroot_tmpdir/scmroot/byacc'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/byacc
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 983dfda !2 Get version in source url from variable version for auto upgrade Merge pull request !2 from rockerzhu/master