Simply HEAD is not displayed by gitk, which is rather a shame.
git remote remove "$remote" 2>/dev/null ||:
git remote add "$remote" $innerwd
git fetch --no-tags -p "$remote" \
git remote remove "$remote" 2>/dev/null ||:
git remote add "$remote" $innerwd
git fetch --no-tags -p "$remote" \
- +"HEAD:refs/remotes/$remote/HEAD"
+ +"HEAD:refs/remotes/$remote/TT-HEAD"
cd $innerwd
GIT_AUTHOR_DATE=$(git log -n1 --pretty=format:'%ai')
GIT_COMMITTER_DATE=$GIT_AUTHOR_DATE
cd $innerwd
GIT_AUTHOR_DATE=$(git log -n1 --pretty=format:'%ai')
GIT_COMMITTER_DATE=$GIT_AUTHOR_DATE