$ git clone -n https://src.fedoraproject.org/rpms/kf5-akonadi-calendar.git /var/lib/mock/f41-build-809626-146321/root/chroot_tmpdir/scmroot/kf5-akonadi-calendar
Cloning into '/var/lib/mock/f41-build-809626-146321/root/chroot_tmpdir/scmroot/kf5-akonadi-calendar'...
$ git fetch origin b02fd48efb49613d48e553651377e3fcee9e93c1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf5-akonadi-calendar
 * [new ref]         b02fd48efb49613d48e553651377e3fcee9e93c1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b02fd48 23.08.5