$ git clone -n https://src.fedoraproject.org/rpms/perl-JSON-Parse.git /var/lib/mock/f45-build-24324-603/root/chroot_tmpdir/scmroot/perl-JSON-Parse
Cloning into '/var/lib/mock/f45-build-24324-603/root/chroot_tmpdir/scmroot/perl-JSON-Parse'...
$ git fetch origin 4eeb92699651bd05420acfdc556793a46d8b7a25:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-JSON-Parse
 * [new ref]         4eeb92699651bd05420acfdc556793a46d8b7a25 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4eeb926 Perl 5.44 rebuild