diff --git a/bin/git-review b/bin/git-review
index 9edad234..4de7fb30 100755
--- a/bin/git-review
+++ b/bin/git-review
@@ -7,6 +7,7 @@ target_branch=''
 remote_name='origin'
 from_checkpoint=''
 save_checkpoint='false'
+reset_checkpoint='false'
 fetch='true'
 local_branch='false'
 
@@ -18,6 +19,7 @@ while [ $# != 0 ]; do
         --remote-name|-r)             remote_name="$2";     shift ;;
 
         --save-checkpoint|--save|-s)  save_checkpoint='true' ;;
+        --reset-checkpoint|--reset)   reset_checkpoint='true' ;;
         --no-fetch)                   fetch='false' ;;
         --local)                      local_branch='true' ;;
 
@@ -44,7 +46,7 @@ debug() {
 }
 
 if [[ -z "$target_branch" ]]; then
-    target_branch="$(git config --get user.defaultReviewBranch)"
+    target_branch="$(git config --get user.default-branch)"
 fi
 
 if [[ -z "$target_branch" ]]; then
@@ -56,12 +58,18 @@ debug target_branch="$target_branch"
 debug remote_name="$remote_name"
 debug from_checkpoint="$from_checkpoint"
 debug save_checkpoint="$save_checkpoint"
+debug reset_checkpoint="$reset_checkpoint"
 debug fetch="$fetch"
 debug local_branch="$local_branch"
 
 if [[ -z "$pr_branch" ]]; then
-    echo "Specify branch to review" >&2
-    return 1
+    pr_branch="$(git current-branch | sed 's|^review/||')"
+    if [[ -z "$pr_branch" ]]; then
+        echo "Specify branch to review" >&2
+        exit 1
+    else
+        echo "No PR branch is specified. Using default branch: $pr_branch"
+    fi
 fi
 
 repo_dir="$(git root-dir)"
@@ -70,10 +78,21 @@ if [[ -z "$repo_dir" ]]; then
 fi
 debug repo_dir="$repo_dir"
 
-checkpoint_file="$repo_dir/.git/review/checkpoints/${pr_branch//\//%}"
+git_dir="$repo_dir/.git"
+if [[ -f "$git_dir" ]]; then
+    git_dir="$(cat "$git_dir" | grep 'gitdir:' | sed 's/^gitdir: //')"
+fi
+
+checkpoint_file="$git_dir/review/checkpoints/${pr_branch//\//%}"
 mkdir -p "$(dirname "$checkpoint_file")"
 debug checkpoint_file="$checkpoint_file"
 
+if [[ "$reset_checkpoint" == 'true' ]]; then
+    rm -f "$checkpoint_file"
+
+    exit 0
+fi
+
 if [[ -z "$from_checkpoint" ]] && [[ -f "$checkpoint_file" ]]; then
     from_checkpoint="$(cat "$checkpoint_file" | tail -n 1)"
     debug from_checkpoint="$from_checkpoint"
@@ -82,7 +101,7 @@ fi
 if [[ "$save_checkpoint" == 'true' ]]; then
     git status
 
-    git commit -m "Reviewed (from checkpoint $from_checkpoint)"
+    git commit -m "Reviewed (from checkpoint $from_checkpoint)" || true
 
     new_checkpoint="$(git rev-parse --verify HEAD)"
     echo "$new_checkpoint" >> "$checkpoint_file"
@@ -113,7 +132,7 @@ if [[ -n "$from_checkpoint" ]] && [[ "$from_checkpoint" != 'null' ]]; then
     git restore --no-overlay --source "$from_checkpoint" -- "$repo_dir"
     git add "$repo_dir"
     git status
-    git commit -am "Reviewed (from checkpoint $from_checkpoint)"
+    git commit -am "Reviewed (from checkpoint $from_checkpoint)" || true
 fi
 
 # git restore --overlay --source "$pr_branch_ref" -- "$repo_dir"
diff --git a/config/gitconfig b/config/gitconfig
index 16ce2b62..4cbb6af4 100644
--- a/config/gitconfig
+++ b/config/gitconfig
@@ -7,6 +7,7 @@
     df = diff
     pick = cherry-pick
     st = status
+    wt = worktree
 
     cor = "!git checkout-remote"
     cr = "!git review"
@@ -19,7 +20,10 @@
     rrb = "!git redo-rebase-on"
 
     # Simple
+    amend = commit --am --no-edit
     current-branch = rev-parse --abbrev-ref HEAD
+    default-branch = config --get user.default-branch
+    set-default-branch = config user.default-branch
     f = fetch -v --all
     l = log --graph --pretty=longline
     ll = log --graph
@@ -28,17 +32,31 @@
     mtv = mergetool --tool customVimMergeTool
     prev = checkout HEAD~
     rb = rebase -i
+    rba = rebase --abort
     rbc = rebase --continue
     rl = log --walk-reflogs --pretty=reflog-short
     rll = log --walk-reflogs --pretty=reflog-long
     root-dir = rev-parse --show-cdup
 
     # External scripts
+    commit-timestamp = "!git commit -m \"$(date -u -Iseconds)\""
+    commit-timestamp-all = "!git commit -am \"$(date -u -Iseconds)\""
+    copy-merge-base = "!git merge-base \"origin/$(git default-branch)\" HEAD | clipboard"
     create-github = "!git-create-github"
     create-gitlab = "!git-create-gitlab"
+    rebase-default = "!git rebase -i \"$(git merge-base \"$(git default-branch)\" HEAD)\""
+    rebase-default-latest = "!git rebase -i \"$(git merge-base \"origin/$(git default-branch)\" HEAD)\""
     review = "!git-review"
+    review-save = "!git review --save"
     review-checkpoint = "!git-review-checkpoint"
 
+    # Aliases
+    ct = commit-timestamp
+    cta = commit-timestamp-all
+    cmb = copy-merge-base
+    rbd = rebase-default
+    rbdl = rebase-default-latest
+
     # Functions
     author-date = "!f() { git filter-repo --force --commit-callback 'commit.committer_date = commit.author_date' --refs HEAD~\"${1:-1}\"..HEAD; }; f"
     author-date-old = "!f() { git filter-branch -f --env-filter 'GIT_COMMITTER_DATE=$GIT_AUTHOR_DATE; export GIT_COMMITTER_DATE' HEAD~\"${1:-1}\"..HEAD; }; f" # git versoin < 2.22.0