$ git clone -n https://src.fedoraproject.org/rpms/perl-Date-ISO8601.git /var/lib/mock/f45-build-22962-595/root/chroot_tmpdir/scmroot/perl-Date-ISO8601
Cloning into '/var/lib/mock/f45-build-22962-595/root/chroot_tmpdir/scmroot/perl-Date-ISO8601'...
$ git fetch origin d2fd7bb631c5bbcd6ee467138b570a25c920a5c3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Date-ISO8601
 * [new ref]         d2fd7bb631c5bbcd6ee467138b570a25c920a5c3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d2fd7bb Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild