A fetch will sync information locally from a remote repository. It will receive missing objects from another repository.
It will mostly
git fetch:
from one or more other remote repositories
remote branche cannot be modify directly, you need to create a tracking branch (ie a local branch that tracks the remote branch head)
The last commit (head) fetched for all branches are in the FETCH_HEAD file located a git_dir/FETCH_HEAD 1)
[fetch]
# make sure we delete branch origin/blah if blah is deleted on the server,
# and also do it automatically for all the remotes that we have configured.
prune = true
pruneTags = true
all = true