Answer by Malcolm Boekhoff for How do I discard unstaged changes in Git?

None of the solutions work if you just changed the permissions of a file (this is on DOS/Windoze)

Mon 23/11/2015-15:16:34.80 C:\...\work\checkout\slf4j+> git status
On branch SLF4J_1.5.3
Changes not staged for commit:
  (use "git add ..." to update what will be committed)
  (use "git checkout -- ..." to discard changes in working directory)

        modified:   .gitignore
        modified:   LICENSE.txt
        modified:   TODO.txt
        modified:   codeStyle.xml
        modified:   pom.xml
        modified:   version.pl

no changes added to commit (use "git add" and/or "git commit -a")

Mon 23/11/2015-15:16:37.87 C:\...\work\checkout\slf4j+> git diff
diff --git a/.gitignore b/.gitignore
old mode 100644
new mode 100755
diff --git a/LICENSE.txt b/LICENSE.txt
old mode 100644
new mode 100755
diff --git a/TODO.txt b/TODO.txt
old mode 100644
new mode 100755
diff --git a/codeStyle.xml b/codeStyle.xml
old mode 100644
new mode 100755
diff --git a/pom.xml b/pom.xml
old mode 100644
new mode 100755
diff --git a/version.pl b/version.pl
old mode 100644
new mode 100755

Mon 23/11/2015-15:16:45.22 C:\...\work\checkout\slf4j+> git reset --hard HEAD
HEAD is now at 8fa8488 12133-CHIXMISSINGMESSAGES MALCOLMBOEKHOFF 20141223124940 Added .gitignore

Mon 23/11/2015-15:16:47.42 C:\...\work\checkout\slf4j+> git clean -f

Mon 23/11/2015-15:16:53.49 C:\...\work\checkout\slf4j+> git stash save -u
Saved working directory and index state WIP on SLF4J_1.5.3: 8fa8488 12133-CHIXMISSINGMESSAGES MALCOLMBOEKHOFF 20141223124940 Added .gitignore
HEAD is now at 8fa8488 12133-CHIXMISSINGMESSAGES MALCOLMBOEKHOFF 20141223124940 Added .gitignore

Mon 23/11/2015-15:17:00.40 C:\...\work\checkout\slf4j+> git stash drop
Dropped refs/stash@{0} (cb4966e9b1e9c9d8daa79ab94edc0c1442a294dd)

Mon 23/11/2015-15:17:06.75 C:\...\work\checkout\slf4j+> git stash drop
Dropped refs/stash@{0} (e6c49c470f433ce344e305c5b778e810625d0529)

Mon 23/11/2015-15:17:08.90 C:\...\work\checkout\slf4j+> git stash drop
No stash found.

Mon 23/11/2015-15:17:15.21 C:\...\work\checkout\slf4j+> git checkout -- .

Mon 23/11/2015-15:22:00.68 C:\...\work\checkout\slf4j+> git checkout -f -- .

Mon 23/11/2015-15:22:04.53 C:\...\work\checkout\slf4j+> git status
On branch SLF4J_1.5.3
Changes not staged for commit:
  (use "git add ..." to update what will be committed)
  (use "git checkout -- ..." to discard changes in working directory)

        modified:   .gitignore
        modified:   LICENSE.txt
        modified:   TODO.txt
        modified:   codeStyle.xml
        modified:   pom.xml
        modified:   version.pl

no changes added to commit (use "git add" and/or "git commit -a")

Mon 23/11/2015-15:22:13.06 C:\...\work\checkout\slf4j+> git diff
diff --git a/.gitignore b/.gitignore
old mode 100644
new mode 100755
diff --git a/LICENSE.txt b/LICENSE.txt
old mode 100644
new mode 100755
diff --git a/TODO.txt b/TODO.txt
old mode 100644
new mode 100755
diff --git a/codeStyle.xml b/codeStyle.xml
old mode 100644
new mode 100755
diff --git a/pom.xml b/pom.xml
old mode 100644
new mode 100755
diff --git a/version.pl b/version.pl
old mode 100644
new mode 100755

The only way to fix this is to manually reset the permissions on the changed files:

Mon 23/11/2015-15:25:43.79 C:\...\work\checkout\slf4j+> git status -s | egrep "^ M" | cut -c4- | for /f "usebackq tokens=* delims=" %A in (`more`) do chmod 644 %~A

Mon 23/11/2015-15:25:55.37 C:\...\work\checkout\slf4j+> git status
On branch SLF4J_1.5.3
nothing to commit, working directory clean

Mon 23/11/2015-15:25:59.28 C:\...\work\checkout\slf4j+>

Mon 23/11/2015-15:26:31.12 C:\...\work\checkout\slf4j+> git diff