As mentioned in "What is the difference between Git Bash and the GitHub for Windows shell?", the GitHub Shell is based on posh-git
, which supports git-svn
.
However, this release note mentions:
git-svn
operations:git svn <tab>
That means, no '-
' between git
and svn
.
If the issue persists, and since GitHub for Windows also includes a msysgit distribution, you could open the msysgit bash instead, and try git svn
commands there too.