$ git clone -n https://src.fedoraproject.org/rpms/perl-DBD-MySQL.git /var/lib/mock/f41-build-816741-150376/root/chroot_tmpdir/scmroot/perl-DBD-MySQL
Cloning into '/var/lib/mock/f41-build-816741-150376/root/chroot_tmpdir/scmroot/perl-DBD-MySQL'...
$ git fetch origin 30f7f10655331441c4cde0f83de775c581003bb6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-DBD-MySQL
 * [new ref]         30f7f10655331441c4cde0f83de775c581003bb6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 30f7f10 Perl 5.40 rebuild