Bar Chart Report - Dynamic Goal Line

Not that I know of specifically with the 'goal line'. Gauges support a dynamic target but not bar charts unfortunately. If your intent is to show gap between the chart and the target - you might consider a stacked bar chart, where y-axis value 1 is your current value and y-axis value 2 is the 'remainder' to your summary target. 

So if you were tracking spend versus budget - you would summarize total spend as your primary y-axis then have another field for 'remaining spend' as just budget - spend and have that field be the second y-axis. This way the secondary color/data point displays how much you have left to spend in this example. You could go further as well in this format and have a third y-axis if you wanted to show 'overage' against the target, so you'd have a third value that shows how much over the budget you might be in a different color to visually see it when it crosses your dynamic threshold.