$ git clone -n https://src.fedoraproject.org/rpms/golang-x-text.git /var/lib/mock/f41-build-809221-146202/root/chroot_tmpdir/scmroot/golang-x-text
Cloning into '/var/lib/mock/f41-build-809221-146202/root/chroot_tmpdir/scmroot/golang-x-text'...
$ git fetch origin a2663482d5349d92a69cce28c2aceebc6148a20e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-x-text
 * [new ref]         a2663482d5349d92a69cce28c2aceebc6148a20e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a266348 update to 0.15.0, close rhbz#2279139