Pycharm asks me if I want to add .idea\vcs.xml to Git

All the project specific settings for project are stored under the .idea folder.

While working, a new file (vcs.xml) was created and hence it gives you the option to add it to Git. The files in the .idea/ should generally not reach Git, and it's usually better to add it to .gitignore file.

If you gitignore the .idea folder then others will not be able to access project specific settings like run configuration, environment variables, build settings, etc., and other miscellaneous additions like project specific dictionaries.

Add vcs.xml to your project and don't entirely gitignore .idea. In fact, Jetbrains recommends to ignore some files (listed below) while still adding the rest to the repo.

Use this .gitignore for all your Jetbrains based products: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio and WebStorm

Just in case the link becomes invalid for any reason I'm pasting it directly here

# User-specific stuff.idea/**/workspace.xml.idea/**/tasks.xml.idea/**/usage.statistics.xml.idea/**/dictionaries.idea/**/shelf# Sensitive or high-churn files.idea/**/dataSources/.idea/**/dataSources.ids.idea/**/dataSources.local.xml.idea/**/sqlDataSources.xml.idea/**/dynamic.xml.idea/**/uiDesigner.xml.idea/**/dbnavigator.xml# Gradle.idea/**/gradle.xml.idea/**/libraries# Gradle and Maven with auto-import# When using Gradle or Maven with auto-import, you should exclude module files,# since they will be recreated, and may cause churn.  Uncomment if using# auto-import.# .idea/modules.xml# .idea/*.iml# .idea/modules# CMakecmake-build-*/# Mongo Explorer plugin.idea/**/mongoSettings.xml# File-based project format*.iws# IntelliJout/# mpeltonen/sbt-idea plugin.idea_modules/# JIRA pluginatlassian-ide-plugin.xml# Cursive Clojure plugin.idea/replstate.xml# Crashlytics plugin (for Android Studio and IntelliJ)com_crashlytics_export_strings.xmlcrashlytics.propertiescrashlytics-build.propertiesfabric.properties# Editor-based Rest Client.idea/httpRequests

For more details, refer to Jetbrains Support Article

There is good official description from JetBrains of which files to put into git.

So in your .gitignore you might ignore the files ending with .iws, and the workspace.xml and tasks.xml files. Here you can find a very good example of gitignore file for JetBrains IDEs.