knotserver/git: add GitRepo.Refresh
after running a command externally that updates the git index, we needto refresh go-git's repr of the git repo. remember to run this afterrunning something like `git am`.Signed-off-by: oppiliappan <me@oppi.li>
authored by oppi.li and committed by Tangled 5 months ago 6a05875f 18cab5b2