$ git clone -n https://src.fedoraproject.org/rpms/kf5-akonadi-calendar.git /var/lib/mock/f38-build-729661-101821/root/chroot_tmpdir/scmroot/kf5-akonadi-calendar
Cloning into '/var/lib/mock/f38-build-729661-101821/root/chroot_tmpdir/scmroot/kf5-akonadi-calendar'...
$ git fetch origin 82b99c6754c699fc2a52a92a200babe7f013897a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf5-akonadi-calendar
 * [new ref]         82b99c6754c699fc2a52a92a200babe7f013897a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 82b99c6 23.04.2