$ git clone -n https://src.fedoraproject.org/rpms/calendar.git /var/lib/mock/f40-build-1992226-43571/root/chroot_tmpdir/scmroot/calendar
Cloning into '/var/lib/mock/f40-build-1992226-43571/root/chroot_tmpdir/scmroot/calendar'...
$ git fetch origin ede8e3ab78349ff621db9bc9ab4ee9fd6c1efc65:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/calendar
 * [new ref]         ede8e3ab78349ff621db9bc9ab4ee9fd6c1efc65 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ede8e3a Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild