$ git clone -n https://src.fedoraproject.org/rpms/golang-etcd-pkg-3.git /var/lib/mock/f40-build-2668766-67234/root/chroot_tmpdir/scmroot/golang-etcd-pkg-3
Cloning into '/var/lib/mock/f40-build-2668766-67234/root/chroot_tmpdir/scmroot/golang-etcd-pkg-3'...
$ git fetch origin f160e356c778162e997290a2773387c704e7ba57:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-etcd-pkg-3
 * [new ref]         f160e356c778162e997290a2773387c704e7ba57 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f160e35 Added the README