/usr/share/fusionforge/plugins/ is in fusionforge-plugin-scmgit 6.0.5-2ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/fusionforge/plugins/scmgit/
/usr/share/fusionforge/plugins/scmgit/GNUmakefile
/usr/share/fusionforge/plugins/scmgit/README.dav
/usr/share/fusionforge/plugins/scmgit/bin/
/usr/share/fusionforge/plugins/scmgit/bin/install.sh
/usr/share/fusionforge/plugins/scmgit/common/
/usr/share/fusionforge/plugins/scmgit/common/GitPlugin.class.php
/usr/share/fusionforge/plugins/scmgit/common/scmgit-init.php
/usr/share/fusionforge/plugins/scmgit/common/scmgit_Widget_MyRepositories.class.php
/usr/share/fusionforge/plugins/scmgit/db/
/usr/share/fusionforge/plugins/scmgit/db/20121019-multiple-repos.sql
/usr/share/fusionforge/plugins/scmgit/db/20121123-use-shared-table.sql
/usr/share/fusionforge/plugins/scmgit/db/20121128-drop-old-tables.sql
/usr/share/fusionforge/plugins/scmgit/db/scmgit-init.sql
/usr/share/fusionforge/plugins/scmgit/etc/
/usr/share/fusionforge/plugins/scmgit/etc/httpd.conf.d/
/usr/share/fusionforge/plugins/scmgit/etc/httpd.conf.d/plugin-scmgit.inc
/usr/share/fusionforge/plugins/scmgit/etc/httpd.conf.d/vhost-scm-plugin-scmgit.inc
/usr/share/fusionforge/plugins/scmgit/etc/scmgit.ini
/usr/share/fusionforge/plugins/scmgit/libexec/
/usr/share/fusionforge/plugins/scmgit/libexec/git-http-backend
/usr/share/fusionforge/plugins/scmgit/libexec/gitlog.php
/usr/share/fusionforge/plugins/scmgit/www/
/usr/share/fusionforge/plugins/scmgit/www/gitweb_footer.html
/usr/share/fusionforge/plugins/scmgit/www/index.php