$ git clone -n https://gitee.com/mgb01105731/py3c.git /var/lib/mock/dist-an23-build-337104-69704/root/chroot_tmpdir/scmroot/py3c
Cloning into '/var/lib/mock/dist-an23-build-337104-69704/root/chroot_tmpdir/scmroot/py3c'...
$ git fetch origin 3a891ab785b3b2c28e3043a74c7c480e71c5736a:KOJI_FETCH_HEAD
From https://gitee.com/mgb01105731/py3c
 * [new ref]         3a891ab785b3b2c28e3043a74c7c480e71c5736a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3a891ab rebuild