$ git clone -n https://src.fedoraproject.org/rpms/perl-CGI-Untaint-date.git /var/lib/mock/f45-build-21989-589/root/chroot_tmpdir/scmroot/perl-CGI-Untaint-date
Cloning into '/var/lib/mock/f45-build-21989-589/root/chroot_tmpdir/scmroot/perl-CGI-Untaint-date'...
$ git fetch origin 6fd6e53b626cd2fa0e5d9821d205bb2113215521:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-CGI-Untaint-date
 * [new ref]         6fd6e53b626cd2fa0e5d9821d205bb2113215521 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6fd6e53 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild