diff --git a/LICENSE b/LICENSE
index c399ecd..dbf1bf6 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1 +1 @@
-LICENSE terms are documented in the COPYRIGHT file at the top-level directory of this distribution and at https://raw.githubusercontent.com/shellfire-dev/jsonreader/master/COPYRIGHT.
+LICENSE terms are documented in the COPYRIGHT file at the top-level directory of this distribution and at https://raw.githubusercontent.com/shellfire-dev/git/master/COPYRIGHT.
diff --git a/README.md b/README.md
index dbe653a..9c1e704 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@ This module provides a simple set of wrapper functions for making it more pleasa
 
 ## Overview
 
-Usage couldn't be simpler. Just pick a function.
+Usage couldn't be simpler. Just pick a function. Please note that most functions are not currently documented.
 
 ## Importing
 
diff --git a/git.functions b/git.functions
index a1dd80d..d1879ad 100644
--- a/git.functions
+++ b/git.functions
@@ -53,6 +53,59 @@ git_doesNotHaveTagPattern()
 	fi
 }
 
+core_dependency_requires '*' git
+git_isPathSomewhereInsideGitRepository()
+{
+	local repositoryFolderPath="$1"
+	
+	pushd "$repositoryFolderPath"
+		
+		set +e
+		git log -n 0 2>/dev/null
+		local exitCode=$?
+		set -e
+		
+	popd
+	
+	return $exitCode
+}
+
+# If in a submodule, walks up the directory hierarchy to the '.git' folder
+# If no repository found, returns ''
+git_findAbsolutePathOfTopLevelOfRepository()
+{
+	local repositoryFolderPath="$1"
+	
+	pushd "$repositoryFolderPath"
+	
+		local currentFolderPath="$(pwd)"
+	
+	popd
+	
+	while ! core_path_isReadableAndSearchableFolderPath "$currentFolderPath"/.git
+	do
+		if [ "$currentFolderPath" = '/' ]; then
+			printf ''
+			return 0
+		fi
+		
+		pushd "$currentFolderPath"/..
+			currentFolderPath="$(pwd)"
+		popd
+	done
+	
+	printf '%s' "$currentFolderPath"
+}
+
+core_dependency_requires '*' grep
+git_hasRemote()
+{
+	local repositoryFolderPath="$1"
+	local remoteName="$2"
+	
+	git_inRepository "$repositoryFolderPath" git remote | grep -q '^'"$remoteName"'$'
+}
+
 git_checkout()
 {
 	local repositoryFolderPath="$1"
@@ -135,6 +188,18 @@ git_commitToTagOrCommit()
 	fi
 }
 
+git_cleanIfGitPresent()
+{
+	local repositoryFolderPath="$1"
+	local repositoryCommit="$2"
+	
+	if core_compatibility_whichNoOutput git; then
+		if git_isPathSomewhereInsideGitRepository "$repositoryFolderPath"; then
+			git_clean "$repositoryFolderPath" "$repositoryCommit"
+		fi
+	fi
+}
+
 git_clean()
 {
 	local repositoryFolderPath="$1"
@@ -146,13 +211,14 @@ git_clean()
 	pushd "$repositoryFolderPath"
 		
 		local submodule
-		while IFS= read -r submodule
+		local sha1
+		while IFS= read -r submodule sha1
 		do
 			if [ -n "$submodule" ]; then
-				git_clean "$submodule" HEAD
+				git_clean "$submodule" "$sha1"
 			fi
 		done <<-EOF
-			$(git submodule foreach -q 'echo "$path"')
+			$(git submodule foreach --quiet 'echo "$path" "$sha1"')
 		EOF
 		
 	popd
@@ -210,6 +276,25 @@ git_tagUpstream()
 	git_tag "$repositoryFolderPath" "$upstreamTagName" "$upstreamTagMessage"
 }
 
+core_dependency_requires '*' git md5sum
+git_localModificationHashOrEmptyString()
+{
+	local repositoryFolderPath="$1"
+	
+	local hashSum
+	local notWanted
+	read -r hashSum notWanted <<-EOF
+		$(git_inRepository "$repositoryFolderPath" git diff --minimal --no-color | md5sum)
+	EOF
+	
+	local emptyStringHash='d41d8cd98f00b204e9800998ecf8427e'
+	if [ "$hashSum" = "$emptyStringHash" ]; then
+		printf ''
+	else
+		printf '%s' "$hashSum"
+	fi
+}
+
 core_dependency_requires '*' cat
 git_patchAm()
 {
@@ -236,15 +321,17 @@ git_cherrypicks()
 	git_inRepositorySilently "$repositoryFolderPath" cherry-pick --strategy=recursive -X theirs "$@"
 }
 
-git_addGitHubClone()
+git_addGitCloneOrFetchFromOriginRemote()
 {
 	local repositoryParentPath="$1"
-	local repositoryUser="$2"
-	local repositoryName="$3"
+	local cloneUrl="$2"
+	local folderName="$3"
 
-	local repositoryFolderPath="$repositoryParentPath"/"$repositoryName"
+	local repositoryFolderPath="$repositoryParentPath"/"$folderName"
 	
 	if [ -d "$repositoryFolderPath"/.git ]; then
+		git_inRepositorySilently "$repositoryFolderPath" submodule update --init --recursive
+		git_fetchFromOriginRemote "$repositoryFolderPath"
 		return 0
 	fi
 	
@@ -258,11 +345,9 @@ git_addGitHubClone()
 	
 	pushd "$repositoryParentPath"
 		
-		git_withOutputSilencedIfQuiet 2 clone git@github.com:"$repositoryUser"/"$repositoryName".git
+		git_withOutputSilencedIfQuiet 2 clone --recursive "$cloneUrl" "$folderName"
 		
 	popd
-	
-	git_inRepositorySilently "$repositoryFolderPath" submodule update --init --recursive
 }
 
 git_addGitHubSubmodule()
@@ -359,7 +444,7 @@ git_fetchFromRemote()
 	local repositoryFolderPath="$1"
 	local remote="$2"
 	
-	git_inRepositorySilently "$repositoryFolderPath" fetch "$remote"	
+	git_inRepositorySilently "$repositoryFolderPath" fetch --tags "$remote"	
 }
 
 core_dependency_requires '*' git