$ git clone -n https://gitee.com/src-opencloudos-rpms/gcc.git /var/lib/mock/dist-oc8-build-252705-84226/root/chroot_tmpdir/scmroot/gcc
Cloning into '/var/lib/mock/dist-oc8-build-252705-84226/root/chroot_tmpdir/scmroot/gcc'...
$ git fetch origin 72f5d43ad02bdd86a67c69f0fe43d416b4315ece:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/gcc
 * [new ref]         72f5d43ad02bdd86a67c69f0fe43d416b4315ece -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 72f5d43 import gcc-8.5.0-29.tl3.ap.1