$ git clone -n https://src.fedoraproject.org/rpms/perl-Encode-JIS2K.git /var/lib/mock/f45-build-23345-597/root/chroot_tmpdir/scmroot/perl-Encode-JIS2K
Cloning into '/var/lib/mock/f45-build-23345-597/root/chroot_tmpdir/scmroot/perl-Encode-JIS2K'...
$ git fetch origin 15e51590535bc753f9c1b166f84589fb5a073fe9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Encode-JIS2K
 * [new ref]         15e51590535bc753f9c1b166f84589fb5a073fe9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 15e5159 Perl 5.44 rebuild