$ git clone -n https://src.fedoraproject.org/rpms/perl-HTML-Form.git /var/lib/mock/f45-build-23874-599/root/chroot_tmpdir/scmroot/perl-HTML-Form
Cloning into '/var/lib/mock/f45-build-23874-599/root/chroot_tmpdir/scmroot/perl-HTML-Form'...
$ git fetch origin 6f8a180e136db79580c09566f51db00cdae47b6b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-HTML-Form
 * [new ref]         6f8a180e136db79580c09566f51db00cdae47b6b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6f8a180 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild