$ git clone -n https://src.fedoraproject.org/rpms/perl-PDL.git /var/lib/mock/f41-build-side-1-2921963-34952/root/chroot_tmpdir/scmroot/perl-PDL
Cloning into '/var/lib/mock/f41-build-side-1-2921963-34952/root/chroot_tmpdir/scmroot/perl-PDL'...
$ git fetch origin 655aadc3ef04c17df00b74fd8f815f218fe349e7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-PDL
 * [new ref]         655aadc3ef04c17df00b74fd8f815f218fe349e7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 655aadc 2.093 bump (rhbz#2315728)