$ git clone -n https://src.fedoraproject.org/rpms/perl-Net-RawIP.git /var/lib/mock/f43-perl-60950557-6586682/root/chroot_tmpdir/scmroot/perl-Net-RawIP
Cloning into '/var/lib/mock/f43-perl-60950557-6586682/root/chroot_tmpdir/scmroot/perl-Net-RawIP'...
$ git fetch origin e13f4f3b6356cbd16ee1a2cb1e0c04574837fdd8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Net-RawIP
 * [new ref]         e13f4f3b6356cbd16ee1a2cb1e0c04574837fdd8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e13f4f3 Perl 5.42 rebuild