diff --git a/plugins/git/git.plugin.zsh b/plugins/git/git.plugin.zsh
index 648fa0a33..8f7e623ec 100644
--- a/plugins/git/git.plugin.zsh
+++ b/plugins/git/git.plugin.zsh
@@ -24,9 +24,7 @@ compdef _git _git_log_prettily=git-log
 
 # Warn if the current branch is a WIP
 function work_in_progress() {
-  if $(git log -n 1 2>/dev/null | grep -q -c "\-\-wip\-\-"); then
-    echo "WIP!!"
-  fi
+  command git -c log.showSignature=false log -n 1 2>/dev/null | grep -q -- "--wip--" && echo "WIP!!"
 }
 
 # Check if main exists and use instead of master
diff --git a/themes/Soliah.zsh-theme b/themes/Soliah.zsh-theme
index 070c54981..c3dd6af89 100644
--- a/themes/Soliah.zsh-theme
+++ b/themes/Soliah.zsh-theme
@@ -45,9 +45,7 @@ function rvm_gemset() {
 function git_time_since_commit() {
     if git rev-parse --git-dir > /dev/null 2>&1; then
         # Only proceed if there is actually a commit.
-        if [[ $(git log 2>&1 > /dev/null | grep -c "^fatal: bad default revision") == 0 ]]; then
-            # Get the last commit.
-            last_commit=`git log --pretty=format:'%at' -1 2> /dev/null`
+        if last_commit=`git -c log.showSignature=false log --pretty=format:'%at' -1 2> /dev/null`; then
             now=`date +%s`
             seconds_since_last_commit=$((now-last_commit))
 
diff --git a/themes/avit.zsh-theme b/themes/avit.zsh-theme
index d117c4e94..f90ba331b 100644
--- a/themes/avit.zsh-theme
+++ b/themes/avit.zsh-theme
@@ -31,7 +31,7 @@ function _git_time_since_commit() {
   local last_commit now seconds_since_last_commit
   local minutes hours days years commit_age
   # Only proceed if there is actually a commit.
-  if last_commit=$(command git -c log.showSignatures=false log --format='%at' -1 2>/dev/null); then
+  if last_commit=$(command git -c log.showSignature=false log --format='%at' -1 2>/dev/null); then
     now=$(date +%s)
     seconds_since_last_commit=$((now-last_commit))
 
diff --git a/themes/dogenpunk.zsh-theme b/themes/dogenpunk.zsh-theme
index 6a9921288..923ca74bc 100644
--- a/themes/dogenpunk.zsh-theme
+++ b/themes/dogenpunk.zsh-theme
@@ -37,9 +37,7 @@ ZSH_THEME_GIT_TIME_SINCE_COMMIT_NEUTRAL="%{$fg[cyan]%}"
 function git_time_since_commit() {
     if git rev-parse --git-dir > /dev/null 2>&1; then
         # Only proceed if there is actually a commit.
-        if git log -n 1  > /dev/null 2>&1; then
-            # Get the last commit.
-            last_commit=`git log --pretty=format:'%at' -1 2> /dev/null`
+        if last_commit=`git -c log.showSignature=false log --pretty=format:'%at' -1 2> /dev/null`; then
             now=`date +%s`
             seconds_since_last_commit=$((now-last_commit))
 
diff --git a/themes/smt.zsh-theme b/themes/smt.zsh-theme
index 7f54472c6..52e6d9a21 100644
--- a/themes/smt.zsh-theme
+++ b/themes/smt.zsh-theme
@@ -40,7 +40,7 @@ function git_time_since_commit() {
     local last_commit seconds_since_last_commit
 
     # Only proceed if there is actually a commit
-    if ! last_commit=$(command git log --pretty=format:'%at' -1 2>/dev/null); then
+    if ! last_commit=$(command git -c log.showSignature=false log --pretty=format:'%at' -1 2>/dev/null); then
         echo "[$ZSH_THEME_GIT_TIME_SINCE_COMMIT_NEUTRAL~%{$reset_color%}]"
         return
     fi
diff --git a/themes/wedisagree.zsh-theme b/themes/wedisagree.zsh-theme
index 07006ecd9..e9e9d6ef8 100644
--- a/themes/wedisagree.zsh-theme
+++ b/themes/wedisagree.zsh-theme
@@ -69,9 +69,7 @@ function rvm_gemset() {
 function git_time_since_commit() {
     if git rev-parse --git-dir > /dev/null 2>&1; then
         # Only proceed if there is actually a commit.
-        if [[ $(git log 2>&1 > /dev/null | grep -c "^fatal: bad default revision") == 0 ]]; then
-            # Get the last commit.
-            last_commit=`git log --pretty=format:'%at' -1 2> /dev/null`
+        if last_commit=`git -c log.showSignature=false log --pretty=format:'%at' -1 2> /dev/null`; then
             now=`date +%s`
             seconds_since_last_commit=$((now-last_commit))
 
diff --git a/tools/changelog.sh b/tools/changelog.sh
index 664f34608..86774a7ea 100755
--- a/tools/changelog.sh
+++ b/tools/changelog.sh
@@ -414,7 +414,7 @@ function main {
   # --first-parent: commits from merged branches are omitted
   local SEP="0mZmAgIcSeP"
   local -a raw_commits
-  raw_commits=(${(0)"$(command git log -z \
+  raw_commits=(${(0)"$(command git -c log.showSignature=false log -z \
     --format="%h${SEP}%D${SEP}%s${SEP}%b" --abbrev=7 \
     --no-merges --first-parent $range)"})