$ git clone -n https://src.fedoraproject.org/rpms/kf6-ksvg.git /var/lib/mock/f40-build-2546028-61905/root/chroot_tmpdir/scmroot/kf6-ksvg
Cloning into '/var/lib/mock/f40-build-2546028-61905/root/chroot_tmpdir/scmroot/kf6-ksvg'...
$ git fetch origin 0904b641963e5922ed3662a9a32264042b3b4e42:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-ksvg
 * [new ref]         0904b641963e5922ed3662a9a32264042b3b4e42 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0904b64 6.0.0