$ git clone -n https://src.fedoraproject.org/rpms/kf6-kiconthemes.git /var/lib/mock/f40-build-768227-13447/root/chroot_tmpdir/scmroot/kf6-kiconthemes
Cloning into '/var/lib/mock/f40-build-768227-13447/root/chroot_tmpdir/scmroot/kf6-kiconthemes'...
$ git fetch origin 13bafc252a60dedd7b4eee6c3bdfaadb2895ea99:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-kiconthemes
 * [new ref]         13bafc252a60dedd7b4eee6c3bdfaadb2895ea99 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 13bafc2 Merge branch 'rawhide' into f40