$ git clone -n https://gitee.com/wenyuzifang/gsm.git /var/lib/mock/dist-an23-build-464784-73881/root/chroot_tmpdir/scmroot/gsm
Cloning into '/var/lib/mock/dist-an23-build-464784-73881/root/chroot_tmpdir/scmroot/gsm'...
$ git fetch origin b64c7f66d52ea3f1dee1eb5eb8949f4c8b1dc3cd:KOJI_FETCH_HEAD
From https://gitee.com/wenyuzifang/gsm
 * [new ref]         b64c7f66d52ea3f1dee1eb5eb8949f4c8b1dc3cd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b64c7f6 Update code from upstream