$ git clone -n https://github.com/xcp-ng-rpms/sm.git /var/lib/mock/v8.3-incoming-9388-28139/root/chroot_tmpdir/scmroot/sm
Cloning into '/var/lib/mock/v8.3-incoming-9388-28139/root/chroot_tmpdir/scmroot/sm'...
$ git fetch origin a0a3be95e9a76e5bc8b20461c1819bc235d3091d:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/sm
 * [new ref]         a0a3be95e9a76e5bc8b20461c1819bc235d3091d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a0a3be9 Merge pull request #85 from xcp-ng-rpms/ran-fix-update-3.2.12-10