$ git clone -n https://src.fedoraproject.org/rpms/kf6-kiconthemes.git /var/lib/mock/f42-build-863342-171641/root/chroot_tmpdir/scmroot/kf6-kiconthemes
Cloning into '/var/lib/mock/f42-build-863342-171641/root/chroot_tmpdir/scmroot/kf6-kiconthemes'...
$ git fetch origin 2e8f0485488fd21b7016b80a8e35d4e866d8c7b2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-kiconthemes
 * [new ref]         2e8f0485488fd21b7016b80a8e35d4e866d8c7b2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2e8f048 Frameworks 6.9