$ git clone -n https://src.fedoraproject.org/rpms/perl-IRI.git /var/lib/mock/f45-build-24241-602/root/chroot_tmpdir/scmroot/perl-IRI
Cloning into '/var/lib/mock/f45-build-24241-602/root/chroot_tmpdir/scmroot/perl-IRI'...
$ git fetch origin d3e70f6c0f392989ba1ed8faa7e36e1c1f567061:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-IRI
 * [new ref]         d3e70f6c0f392989ba1ed8faa7e36e1c1f567061 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d3e70f6 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild