$ git clone -n https://src.fedoraproject.org/rpms/rubygem-rspec-its.git /var/lib/mock/f45-build-35270-694/root/chroot_tmpdir/scmroot/rubygem-rspec-its
Cloning into '/var/lib/mock/f45-build-35270-694/root/chroot_tmpdir/scmroot/rubygem-rspec-its'...
$ git fetch origin 733c1abd0f067ffc3361b2e23e69df686b3b439d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-rspec-its
 * [new ref]         733c1abd0f067ffc3361b2e23e69df686b3b439d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 733c1ab Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild