$ git clone -n https://src.fedoraproject.org/rpms/kf6-kcalendarcore.git /var/lib/mock/f41-build-857581-168142/root/chroot_tmpdir/scmroot/kf6-kcalendarcore
Cloning into '/var/lib/mock/f41-build-857581-168142/root/chroot_tmpdir/scmroot/kf6-kcalendarcore'...
$ git fetch origin 9988b761d0c6e039039504942cc53179201f9a82:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-kcalendarcore
 * [new ref]         9988b761d0c6e039039504942cc53179201f9a82 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9988b76 6.7.0