$ git clone -n https://src.fedoraproject.org/rpms/perl-Date-Tiny.git /var/lib/mock/f45-build-22995-595/root/chroot_tmpdir/scmroot/perl-Date-Tiny
Cloning into '/var/lib/mock/f45-build-22995-595/root/chroot_tmpdir/scmroot/perl-Date-Tiny'...
$ git fetch origin 67793e644ce21d17de9a1fc1f77430d21d11cfc6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Date-Tiny
 * [new ref]         67793e644ce21d17de9a1fc1f77430d21d11cfc6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 67793e6 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild