$ git clone -n https://src.fedoraproject.org/rpms/perl-Class-ReturnValue.git /var/lib/mock/f45-build-22355-591/root/chroot_tmpdir/scmroot/perl-Class-ReturnValue
Cloning into '/var/lib/mock/f45-build-22355-591/root/chroot_tmpdir/scmroot/perl-Class-ReturnValue'...
$ git fetch origin 906937aaf734889c91666aa3a9a658c13a0ac6e3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Class-ReturnValue
 * [new ref]         906937aaf734889c91666aa3a9a658c13a0ac6e3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 906937a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild