git status shows modifications, git checkout -- <file> doesn't remove them

Question

I would like to remove all changes to my working copy.
Running 'git status' shows files modified.
Nothing I do seems to remove these modifications.
E.g.:

rbellamy@PROMETHEUS /d/Development/rhino-etl (master)
$ git status
# On branch master
# Changed but not updated:
#   (use "git add <file>..." to update what will be committed)
#   (use "git checkout -- <file>..." to discard changes in working directory)
#
#       modified:   Rhino.Etl.Core/Enumerables/CachingEnumerable.cs
#       modified:   Rhino.Etl.Core/Pipelines/SingleThreadedPipelineExecuter.cs
#       modified:   Rhino.Etl.Tests/Rhino.Etl.Tests.csproj
#       modified:   Rhino.Etl.Tests/SingleThreadedPipelineExecuterTest.cs
#
no changes added to commit (use "git add" and/or "git commit -a")

rbellamy@PROMETHEUS /d/Development/rhino-etl (master)
$ git checkout -- Rhino.Etl.Core/Enumerables/CachingEnumerable.cs

rbellamy@PROMETHEUS /d/Development/rhino-etl (master)
$ git status
# On branch master
# Changed but not updated:
#   (use "git add <file>..." to update what will be committed)
#   (use "git checkout -- <file>..." to discard changes in working directory)
#
#       modified:   Rhino.Etl.Core/Enumerables/CachingEnumerable.cs
#       modified:   Rhino.Etl.Core/Pipelines/SingleThreadedPipelineExecuter.cs
#       modified:   Rhino.Etl.Tests/Rhino.Etl.Tests.csproj
#       modified:   Rhino.Etl.Tests/SingleThreadedPipelineExecuterTest.cs
#
no changes added to commit (use "git add" and/or "git commit -a")

rbellamy@PROMETHEUS /d/Development/rhino-etl (master)
$ git checkout `git ls-files -m`

rbellamy@PROMETHEUS /d/Development/rhino-etl (master)
$ git status
# On branch master
# Changed but not updated:
#   (use "git add <file>..." to update what will be committed)
#   (use "git checkout -- <file>..." to discard changes in working directory)
#
#       modified:   Rhino.Etl.Core/Enumerables/CachingEnumerable.cs
#       modified:   Rhino.Etl.Core/Pipelines/SingleThreadedPipelineExecuter.cs
#       modified:   Rhino.Etl.Tests/Rhino.Etl.Tests.csproj
#       modified:   Rhino.Etl.Tests/SingleThreadedPipelineExecuterTest.cs
#
no changes added to commit (use "git add" and/or "git commit -a")

rbellamy@PROMETHEUS /d/Development/rhino-etl (master)
$ git reset --hard HEAD
HEAD is now at 6c857e7 boo libraries updated to 2.0.9.2 and rhino.dsl.dll updated.

rbellamy@PROMETHEUS /d/Development/rhino-etl (master)
$ git status
# On branch master
# Changed but not updated:
#   (use "git add <file>..." to update what will be committed)
#   (use "git checkout -- <file>..." to discard changes in working directory)
#
#       modified:   Rhino.Etl.Core/Enumerables/CachingEnumerable.cs
#       modified:   Rhino.Etl.Core/Pipelines/SingleThreadedPipelineExecuter.cs
#       modified:   Rhino.Etl.Tests/Rhino.Etl.Tests.csproj
#       modified:   Rhino.Etl.Tests/SingleThreadedPipelineExecuterTest.cs
#
no changes added to commit (use "git add" and/or "git commit -a")

Answer 1

Try this:

git config --global core.autocrlf false

I've had these kinds of problems too. It comes down to git automaticly converting crlf to lf. Why it keeps telling the files are changed is not really clear to me either.

Edit:

The git manpages say this:

http://www.kernel.org/pub/software/scm/git/docs/git-config.html

CRLF conversion bears a slight chance of corrupting data. autocrlf=true will convert CRLF to LF during commit and LF to CRLF during checkout. A file that contains a mixture of LF and CRLF before the commit cannot be recreated by git. For text files this is the right thing to do: it corrects line endings such that we have only LF line endings in the repository. But for binary files that are accidentally classified as text the conversion can corrupt data.