$ git clone -n https://src.fedoraproject.org/rpms/perl-Function-Parameters.git /var/lib/mock/f45-build-23656-598/root/chroot_tmpdir/scmroot/perl-Function-Parameters
Cloning into '/var/lib/mock/f45-build-23656-598/root/chroot_tmpdir/scmroot/perl-Function-Parameters'...
$ git fetch origin a3e8ec69fd6d19b9fde7d815616b8f37f081f7e3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Function-Parameters
 * [new ref]         a3e8ec69fd6d19b9fde7d815616b8f37f081f7e3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a3e8ec6 Perl 5.44 rebuild