$ git clone -n https://src.fedoraproject.org/rpms/perl-Test-Without-Module.git /var/lib/mock/f45-build-26979-620/root/chroot_tmpdir/scmroot/perl-Test-Without-Module
Cloning into '/var/lib/mock/f45-build-26979-620/root/chroot_tmpdir/scmroot/perl-Test-Without-Module'...
$ git fetch origin 009f57f36f9518a0f06c86d033f520e424dfc596:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Test-Without-Module
 * [new ref]         009f57f36f9518a0f06c86d033f520e424dfc596 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 009f57f Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild