$ git clone -n https://src.fedoraproject.org/rpms/perl-Date-Manip.git /var/lib/mock/f45-build-22959-595/root/chroot_tmpdir/scmroot/perl-Date-Manip
Cloning into '/var/lib/mock/f45-build-22959-595/root/chroot_tmpdir/scmroot/perl-Date-Manip'...
$ git fetch origin 3c9bb8c32e21340097d0e22d7c539e6645900f4e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Date-Manip
 * [new ref]         3c9bb8c32e21340097d0e22d7c539e6645900f4e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3c9bb8c Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild