$ git clone -n https://src.fedoraproject.org/rpms/perl-Date-JD.git /var/lib/mock/f45-build-22973-595/root/chroot_tmpdir/scmroot/perl-Date-JD
Cloning into '/var/lib/mock/f45-build-22973-595/root/chroot_tmpdir/scmroot/perl-Date-JD'...
$ git fetch origin a3b2b162f5c3706864f86599316ba262868fb36e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Date-JD
 * [new ref]         a3b2b162f5c3706864f86599316ba262868fb36e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a3b2b16 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild