$ git clone -n https://src.fedoraproject.org/rpms/perl-DBD-MySQL.git /var/lib/mock/f40-build-1179347-21865/root/chroot_tmpdir/scmroot/perl-DBD-MySQL
Cloning into '/var/lib/mock/f40-build-1179347-21865/root/chroot_tmpdir/scmroot/perl-DBD-MySQL'...
$ git fetch origin f86cd14cbdfcf04d801fbee8e6c9a93cd191278a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-DBD-MySQL
 * [new ref]         f86cd14cbdfcf04d801fbee8e6c9a93cd191278a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f86cd14 5.006 bump (rhbz#2290474)