$ git clone -n https://src.fedoraproject.org/rpms/kf6-kcalendarcore.git /var/lib/mock/f40-build-2276519-55166/root/chroot_tmpdir/scmroot/kf6-kcalendarcore
Cloning into '/var/lib/mock/f40-build-2276519-55166/root/chroot_tmpdir/scmroot/kf6-kcalendarcore'...
$ git fetch origin 039bef7d4ff3fbb7bbba87d6abe65d9878e8f787:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-kcalendarcore
 * [new ref]         039bef7d4ff3fbb7bbba87d6abe65d9878e8f787 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 039bef7 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild