Update PRs with files changed in src/coreclr/src/*

rewrite.sh

# BACKUP your repo before doing this in case something goes wrong
# This isn't tested with commit ranges that include merge commits. Use with caution!
# Requires a Unix shell terminal

# REPLACE #START_COMMIT# with the SHA of the commit BEFORE (parent of) your first commit that you want to update.
# You need to git push --force to your branch after you validated that the commits are correct.

# Usage example:
# cd runtime
# vi script.sh (add content)
# chmod +x rewrite.sh
# Replace #START_COMMIT# with the SHA before your first commit.
# ./rewrite.sh
# rm rewrite.sh
# Validate changes in the tree!
# git push -f (to your branch!)

git filter-branch --index-filter '
  git ls-files -s |
  perl -0pe "s{src/coreclr/src}{src/coreclr}" |
  GIT_INDEX_FILE=$GIT_INDEX_FILE.new git update-index --index-info &&
  mv $GIT_INDEX_FILE.new $GIT_INDEX_FILE
' -f -- #START_COMMIT#..HEAD

Do I want to start a rebase before using this?

No, that command should be executed outside of any (pending) rebase operation.