$ git clone -n https://src.fedoraproject.org/rpms/perl-Sort-Key.git /var/lib/mock/f45-build-26249-616/root/chroot_tmpdir/scmroot/perl-Sort-Key
Cloning into '/var/lib/mock/f45-build-26249-616/root/chroot_tmpdir/scmroot/perl-Sort-Key'...
$ git fetch origin aa24d3b61d8732ba95bcf8e4a328ab389e6ab98e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Sort-Key
 * [new ref]         aa24d3b61d8732ba95bcf8e4a328ab389e6ab98e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at aa24d3b Perl 5.44 rebuild