$ git clone -n https://src.fedoraproject.org/rpms/perl-DBI-Dumper.git /var/lib/mock/f41-build-816726-150376/root/chroot_tmpdir/scmroot/perl-DBI-Dumper
Cloning into '/var/lib/mock/f41-build-816726-150376/root/chroot_tmpdir/scmroot/perl-DBI-Dumper'...
$ git fetch origin 7b0dca9bce84c691b70bad6741ca37f1d107db5d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-DBI-Dumper
 * [new ref]         7b0dca9bce84c691b70bad6741ca37f1d107db5d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7b0dca9 Perl 5.40 rebuild