$ git clone -n https://src.fedoraproject.org/rpms/perl-Plack-Middleware-Test-StashWarnings.git /var/lib/mock/f45-build-25855-613/root/chroot_tmpdir/scmroot/perl-Plack-Middleware-Test-StashWarnings
Cloning into '/var/lib/mock/f45-build-25855-613/root/chroot_tmpdir/scmroot/perl-Plack-Middleware-Test-StashWarnings'...
$ git fetch origin c14f6c8f29624cbda9ad400b7a6cac16ff614176:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Plack-Middleware-Test-StashWarnings
 * [new ref]         c14f6c8f29624cbda9ad400b7a6cac16ff614176 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c14f6c8 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild