$ git clone -n https://src.fedoraproject.org/rpms/kf6-kcalendarcore.git /var/lib/mock/f40-build-2392866-60530/root/chroot_tmpdir/scmroot/kf6-kcalendarcore
Cloning into '/var/lib/mock/f40-build-2392866-60530/root/chroot_tmpdir/scmroot/kf6-kcalendarcore'...
$ git fetch origin 1db906ed26060bb96ee59745ff7b34a74995a4ca:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-kcalendarcore
 * [new ref]         1db906ed26060bb96ee59745ff7b34a74995a4ca -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1db906e 5.249.0