$ git clone -n https://src.fedoraproject.org/rpms/perl-Unicode-Map.git /var/lib/mock/f45-build-27304-622/root/chroot_tmpdir/scmroot/perl-Unicode-Map
Cloning into '/var/lib/mock/f45-build-27304-622/root/chroot_tmpdir/scmroot/perl-Unicode-Map'...
$ git fetch origin 46e307aff09bfa11419aaf701b942f939c1d670d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Unicode-Map
 * [new ref]         46e307aff09bfa11419aaf701b942f939c1d670d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 46e307a Perl 5.44 rebuild