## vcs.require_git_version()


Refuse a git older than [MIN_GIT_VERSION](vcs.MIN_GIT_VERSION.md#tether.vcs.MIN_GIT_VERSION); an unparseable banner (a


Usage

``` python
vcs.require_git_version(exe)
```


custom build) passes, as jj's does.


## Raises


`VcsError`  
`exe` is too old, missing, or fails `--version`.