$ git clone -n https://src.fedoraproject.org/rpms/kf5-kcalendarutils.git /var/lib/mock/f39-build-1587729-38222/root/chroot_tmpdir/scmroot/kf5-kcalendarutils
Cloning into '/var/lib/mock/f39-build-1587729-38222/root/chroot_tmpdir/scmroot/kf5-kcalendarutils'...
$ git fetch origin 89560deae3c017ca2ec3be55a0104bffde439d2d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf5-kcalendarutils
 * [new ref]         89560deae3c017ca2ec3be55a0104bffde439d2d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 89560de 23.08.2