$ git clone -n https://src.fedoraproject.org/rpms/kf5-kcalendarcore.git /var/lib/mock/f40-build-786875-134632/root/chroot_tmpdir/scmroot/kf5-kcalendarcore
Cloning into '/var/lib/mock/f40-build-786875-134632/root/chroot_tmpdir/scmroot/kf5-kcalendarcore'...
$ git fetch origin ba3bbcf2146d76bcfd2c012aed2846508098c208:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf5-kcalendarcore
 * [new ref]         ba3bbcf2146d76bcfd2c012aed2846508098c208 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ba3bbcf 5.115.0