$ git clone -n https://src.fedoraproject.org/rpms/akonadi-calendar-tools.git /var/lib/mock/f39-build-1653171-40514/root/chroot_tmpdir/scmroot/akonadi-calendar-tools
Cloning into '/var/lib/mock/f39-build-1653171-40514/root/chroot_tmpdir/scmroot/akonadi-calendar-tools'...
$ git fetch origin aff9f0bbafda9e29a6a0f07ca394ab43c3dab8ab:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/akonadi-calendar-tools
 * [new ref]         aff9f0bbafda9e29a6a0f07ca394ab43c3dab8ab -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at aff9f0b 23.08.2