I wouldn't worry about it much, but there are epoxies that you can use to seal these types of cracks.
If you're REALLY concerned you can do a full drill and fill project where you drill at about a 45deg angle, then inject the polyurethane with a packer and it'll seal it very well.
Not cheap. Messy. But should eliminate most of the worries.
Also, the crack is going into the ground, so you'll have to dig down, find the end of it, and start the drill fill from there moving up.
We usually grout / fill from the bottom up to get rid of the water, but in this case...I wouldn't be too worried.
The SikaFix® Kit CA is an injection package for the repair of leaking cracks in foundations and waterproofing of piping penetrations, static joints and other types of voids. The kit includes hydraulic mortar for crack plugging, injections T’s and a two-part expansive hydrophobic polyurethane...
can.sika.com
Each product has different applications, but SIKA has good product. Your other options are MAPEI, GeoForm, BASF, etc.