diff --git a/extensions/git/src/historyProvider.ts b/extensions/git/src/historyProvider.ts
index b18923d56b7..9512facf774 100644
--- a/extensions/git/src/historyProvider.ts
+++ b/extensions/git/src/historyProvider.ts
@@ -90,7 +90,7 @@ export class GitHistoryProvider implements SourceControlHistoryProvider, FileDec
 	readonly onDidChangeHistoryItemRefs: Event<SourceControlHistoryItemRefsChangeEvent> = this._onDidChangeHistoryItemRefs.event;
 
 	private _HEAD: Branch | undefined;
-	private historyItemRefs: SourceControlHistoryItemRef[] = [];
+	private _historyItemRefs: SourceControlHistoryItemRef[] = [];
 
 	private historyItemDecorations = new Map<string, FileDecoration>();
 
@@ -112,6 +112,14 @@ export class GitHistoryProvider implements SourceControlHistoryProvider, FileDec
 			return;
 		}
 
+		// Refs (alphabetically)
+		const historyItemRefs = this.repository.refs
+			.map(ref => toSourceControlHistoryItemRef(this.repository, ref))
+			.sort((a, b) => a.id.localeCompare(b.id));
+
+		const delta = deltaHistoryItemRefs(this._historyItemRefs, historyItemRefs);
+		this._historyItemRefs = historyItemRefs;
+
 		let historyItemRefId = '';
 		let historyItemRefName = '';
 
@@ -130,8 +138,9 @@ export class GitHistoryProvider implements SourceControlHistoryProvider, FileDec
 						icon: new ThemeIcon('cloud')
 					} : undefined;
 
-					// Base - compute only if the branch has changed
+					// Base
 					if (this._HEAD?.name !== this.repository.HEAD.name) {
+						// Compute base if the branch has changed
 						const mergeBase = await this.resolveHEADMergeBase();
 
 						this._currentHistoryItemBaseRef = mergeBase &&
@@ -142,6 +151,17 @@ export class GitHistoryProvider implements SourceControlHistoryProvider, FileDec
 							revision: mergeBase.commit,
 							icon: new ThemeIcon('cloud')
 						} : undefined;
+					} else {
+						// Update base revision if it has changed
+						const mergeBaseModified = delta.modified
+							.find(ref => ref.id === this._currentHistoryItemBaseRef?.id);
+
+						if (this._currentHistoryItemBaseRef && mergeBaseModified) {
+							this._currentHistoryItemBaseRef = {
+								...this._currentHistoryItemBaseRef,
+								revision: mergeBaseModified.revision
+							};
+						}
 					}
 				} else {
 					// Detached commit
@@ -178,18 +198,10 @@ export class GitHistoryProvider implements SourceControlHistoryProvider, FileDec
 		this.logger.trace(`[GitHistoryProvider][onDidRunWriteOperation] currentHistoryItemRemoteRef: ${JSON.stringify(this._currentHistoryItemRemoteRef)}`);
 		this.logger.trace(`[GitHistoryProvider][onDidRunWriteOperation] currentHistoryItemBaseRef: ${JSON.stringify(this._currentHistoryItemBaseRef)}`);
 
-		// Refs (alphabetically)
-		const historyItemRefs = this.repository.refs
-			.map(ref => toSourceControlHistoryItemRef(this.repository, ref))
-			.sort((a, b) => a.id.localeCompare(b.id));
-
 		// Auto-fetch
 		const silent = result.operation.kind === OperationKind.Fetch && result.operation.showProgress === false;
-		const delta = deltaHistoryItemRefs(this.historyItemRefs, historyItemRefs);
 		this._onDidChangeHistoryItemRefs.fire({ ...delta, silent });
 
-		this.historyItemRefs = historyItemRefs;
-
 		const deltaLog = {
 			added: delta.added.map(ref => ref.id),
 			modified: delta.modified.map(ref => ref.id),