$ git clone -n https://src.fedoraproject.org/rpms/macchanger.git /var/lib/mock/f41-build-1022297-18064/root/chroot_tmpdir/scmroot/macchanger
Cloning into '/var/lib/mock/f41-build-1022297-18064/root/chroot_tmpdir/scmroot/macchanger'...
$ git fetch origin 1aac5289c3e833ca3421f63e05cd982683d46d8d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/macchanger
 * [new ref]         1aac5289c3e833ca3421f63e05cd982683d46d8d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1aac528 Eliminate use of obsolete %patchN syntax (#2283636)