Tell the Unity Scroll Rect View to snap to the given element (top).

ScrollRectExtensions.cs

using UnityEngine;
using UnityEngine.UI;

public static class ScrollRectExtensions
{
    /// <summary>
    /// Tell the Scroll Rect View to snap to the given element (top).
    /// </summary>
    public static void SnapTo(
        this ScrollRect scrollRect,
        RectTransform target,
        float offsetX = 0f,
        float offsetY = 0f
    )
    {
        Canvas.ForceUpdateCanvases();

        Vector2 contentPosition = scrollRect.transform.InverseTransformPoint(scrollRect.content.position);
        Vector2 newPosition = scrollRect.transform.InverseTransformPoint(target.position);
        newPosition = new Vector2(newPosition.x + offsetX, newPosition.y + offsetY);

        if (!scrollRect.horizontal)
            newPosition.x = contentPosition.x;

        if (!scrollRect.vertical)
            newPosition.y = contentPosition.y;

        scrollRect.content.anchoredPosition = contentPosition - newPosition;
    }
}