$ git clone -n https://gitee.com/src-opencloudos-rpms/gcc.git /var/lib/mock/dist-oc8-build-198845-80470/root/chroot_tmpdir/scmroot/gcc
Cloning into '/var/lib/mock/dist-oc8-build-198845-80470/root/chroot_tmpdir/scmroot/gcc'...
$ git fetch origin 1fd26858f15603a7ac1ec2c2057212669a2f31ae:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/gcc
 * [new ref]         1fd26858f15603a7ac1ec2c2057212669a2f31ae -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1fd2685 import gcc-8.5.0-28.tl3.ap.1