How to clean the facing masonry from the masonry mortar?

While laying masonry, despite the fact that the brick was wet that day, there was a heavy slanting rain at night, and the next morning we saw such a picture – washed ~ 1 cm p-ras from the top almost to the bottom of this mortar in the fresh masonry. Tried to wash out with acetic acid (+ water washed, soapy water washed), bought a special agent to remove the cement. The effect is almost absent. Also tried vegetable oil – helps, but the color of the masonry becomes different, but the entire facade is smeared because of this – not an option. Exacerbates the fact that the brick is embossed, it is difficult to wash it in the cracks. As a result, after various rinses left a whitish masonry. I hope someone can tell me what other options are available. Really want to fix the face of the facade.