[PATCH 05/15] refs.c: add a function to append a reflog entry to a fd

commit 07baa71eda8d1047f003acc7ea32ad6b6600b179 upstream. Break out the code to create the string and writing it to the file descriptor from log_ref_write and into a dedicated function log_ref_write_fd. For now this is only used from log_ref_write but later on we will call this function from

[PATCH 05/15] refs.c: add a function to append a reflog entry to a fd

Break out the code to create the string and writing it to the file descriptor from log_ref_write and into a dedicated function log_ref_write_fd. For now this is only used from log_ref_write but later on we will call this function from reflog transactions too which means that we will end up with