Imagine a situation: You are using git (maybe you like it, or maybe you just have to deal with it because people on the other end do that), you are starting to get familiar with it, make some changes to some source code, then want to synchronize with upstream.
You know that your changes are nothing dramatic, a line here, a word there.
So you go ahead and type git pull, expecting the merge to go seamlessly.
BAM! a conflict! (as it happens, upstream decided to throw out the file and put something completely different in its place)
No biggie, you say, i don't care about my changes, just give me their version. svn revert path/to/file would solve that in a whim.
First of all, you need to locate the file. "git status" won't tell you. Instead, type git commit.
It will say that there are conflicts and list them.
For each conflicting file, git checkout --theirs path/to/file will take the remote version. Similarly, --ours throws away remote changes.
Then just git add the files as usual, or simply go ahead and git commit -a. Done, voila!