$ git clone -n https://src.fedoraproject.org/rpms/perl-Set-Array.git /var/lib/mock/f45-build-26199-616/root/chroot_tmpdir/scmroot/perl-Set-Array
Cloning into '/var/lib/mock/f45-build-26199-616/root/chroot_tmpdir/scmroot/perl-Set-Array'...
$ git fetch origin 6e8ec4ab6286ed58d2be59e62b5927a2981955ca:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Set-Array
 * [new ref]         6e8ec4ab6286ed58d2be59e62b5927a2981955ca -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6e8ec4a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild