$ git clone -n https://src.fedoraproject.org/rpms/perl-Sub-Override.git /var/lib/mock/f45-build-26357-617/root/chroot_tmpdir/scmroot/perl-Sub-Override
Cloning into '/var/lib/mock/f45-build-26357-617/root/chroot_tmpdir/scmroot/perl-Sub-Override'...
$ git fetch origin 42cf90bc084428dc54cc7cb4acdbf1ea7b991413:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Sub-Override
 * [new ref]         42cf90bc084428dc54cc7cb4acdbf1ea7b991413 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 42cf90b Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild