$ git clone -n https://src.fedoraproject.org/rpms/perl-true.git /var/lib/mock/f41-build-816858-150466/root/chroot_tmpdir/scmroot/perl-true
Cloning into '/var/lib/mock/f41-build-816858-150466/root/chroot_tmpdir/scmroot/perl-true'...
$ git fetch origin d97022246537d267b56b29277701fd643979f042:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-true
 * [new ref]         d97022246537d267b56b29277701fd643979f042 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d970222 Perl 5.40 rebuild