What I used to recommend to my sofware engineering classes is that instead of putting large files (media etc) into Git, put them into the artifact repository (Artifactory or something like it). That lets you for instance publish it as a snapshot dependency that the build system will automatically fetch for you, but control how much history of it you keep and only require your colleagues to fetch the latest version. Even better, a simple clean of their build system cache will free up the space used by old versions on their machines.
Tying it all in with GitLab, Artifactory, CodeSonar, Anchore etc