$ git clone -n https://github.com/xcp-ng-rpms/sm.git /var/lib/mock/v8.3-ci-9847-28562/root/chroot_tmpdir/scmroot/sm
Cloning into '/var/lib/mock/v8.3-ci-9847-28562/root/chroot_tmpdir/scmroot/sm'...
$ git fetch origin 31db65783b750a76fc2796249d8e9efad116eaf3:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/sm
 * [new ref]         31db65783b750a76fc2796249d8e9efad116eaf3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 31db657 Merge pull request #88 from xcp-ng-rpms/update-to-3.2.12-16