$ git clone -n https://github.com/xcp-ng-rpms/smartmontools.git /var/lib/mock/v8.3-incoming-9971-28628/root/chroot_tmpdir/scmroot/smartmontools
Cloning into '/var/lib/mock/v8.3-incoming-9971-28628/root/chroot_tmpdir/scmroot/smartmontools'...
$ git fetch origin 3e9213fd3c7af730a5ede02ce3f763092e37d105:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/smartmontools
 * [new ref]         3e9213fd3c7af730a5ede02ce3f763092e37d105 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3e9213f Update to version 7.5-1