$ git clone -n https://github.com/xcp-ng-rpms/sm.git /var/lib/mock/v8.3-incoming-11528-29848/root/chroot_tmpdir/scmroot/sm
Cloning into '/var/lib/mock/v8.3-incoming-11528-29848/root/chroot_tmpdir/scmroot/sm'...
$ git fetch origin e6a5eb7e6e4ab4140f4ae2e090db00764a0d4eff:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/sm
 * [new ref]         e6a5eb7e6e4ab4140f4ae2e090db00764a0d4eff -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e6a5eb7 fairlock: Fix upgrade warning by reloading service files