I have been using Git for a number of years and I can remember feeling quite daunted at the complexity of some of the commands I saw on the internet. When I started using Git on a daily basis I soon realised that the basics were quite simple and the complexity only lay further down the road with commands like cherry-pick or rebase.
When installing composer dependencies those dependencies are downloaded and stored in the 'vendor' directory.
If you have changed or updated a git repository and want to throw away your changes then a good way of forcing the latest changes to run a combination of two commands. The first command is git fetch --all, which tells git to download the latest updates from the remote without trying to merge or rebase anything.
Use the following command to find out how many commits there have been in a git repository. Not really useful in itself, but an interesting figure to see how active a project has been over it's lifetime.
git log --oneline --all | wc -l
The following git log flags are in use here: