strace git pull<p>```
lstat(".git/refs/tags/HEAD", 0x7ffed22c0b10) = -1 ENOENT (No such file or directory)
stat(".git/packed-refs", {st_mode=S_IFREG|0644, st_size=114, ...}) = 0
lstat(".git/refs/heads/HEAD", 0x7ffed22c0b10) = -1 ENOENT (No such file or directory)
stat(".git/packed-refs", {st_mode=S_IFREG|0644, st_size=114, ...}) = 0
lstat(".git/refs/remotes/HEAD", 0x7ffed22c0b10) = -1 ENOENT (No such file or directory)
stat(".git/packed-refs", {st_mode=S_IFREG|0644, st_size=114, ...}) = 0
lstat(".git/refs/remotes/HEAD/HEAD", 0x7ffed22c0b10) = -1 ENOENT (No such file or directory)
stat(".git/packed-refs", {st_mode=S_IFREG|0644, st_size=114, ...}) = 0
stat("/usr/lib/git-core/git", {st_mode=S_IFREG|0755, st_size=3093072, ...}) = 0
pipe([3, 4]) = 0
rt_sigprocmask(SIG_SETMASK, ~[RTMIN RT_1], [], 8) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x7fd39f040e50) = 1430
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
close(4) = 0
read(3, "", 8) = 0
close(3) = 0
wait4(1430, 0x7ffed22c0ec4, 0, NULL) = ? ERESTARTSYS (To be restarted if SA_RESTART is set)
--- SIGWINCH {si_signo=SIGWINCH, si_code=SI_KERNEL} ---
wait4(1430,
```