$ git clone -n https://src.fedoraproject.org/rpms/perl-DBD-MySQL.git /var/lib/mock/f40-build-2674650-67735/root/chroot_tmpdir/scmroot/perl-DBD-MySQL
Cloning into '/var/lib/mock/f40-build-2674650-67735/root/chroot_tmpdir/scmroot/perl-DBD-MySQL'...
$ git fetch origin 966a240019bc7bf10964106021aca484548b60db:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-DBD-MySQL
 * [new ref]         966a240019bc7bf10964106021aca484548b60db -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 966a240 community-mysql was replaced by mysql