Remote: remove Get prefix from refspecs

Idiomatic Go is to omit the Get from the getter methods.
diff --git a/remote.go b/remote.go
index 3e01ce1..d556f99 100644
--- a/remote.go
+++ b/remote.go
@@ -316,7 +316,7 @@
 	C.free(unsafe.Pointer(arr.strings))
 }
 
-func (o *Remote) GetFetchRefspecs() ([]string, error) {
+func (o *Remote) FetchRefspecs() ([]string, error) {
 	crefspecs := C.git_strarray{}
 
 	runtime.LockOSThread()
@@ -362,7 +362,7 @@
 	return nil
 }
 
-func (o *Remote) GetPushRefspecs() ([]string, error) {
+func (o *Remote) PushRefspecs() ([]string, error) {
 	crefspecs := C.git_strarray{}
 
 	runtime.LockOSThread()
diff --git a/remote_test.go b/remote_test.go
index 16675fc..04b3a57 100644
--- a/remote_test.go
+++ b/remote_test.go
@@ -20,7 +20,7 @@
 	err = remote.SetFetchRefspecs(expected)
 	checkFatal(t, err)
 
-	actual, err := remote.GetFetchRefspecs()
+	actual, err := remote.FetchRefspecs()
 	checkFatal(t, err)
 
 	compareStringList(t, expected, actual)