$ git clone -n https://src.fedoraproject.org/rpms/perl-Test-Data-Split.git /var/lib/mock/f45-build-26625-618/root/chroot_tmpdir/scmroot/perl-Test-Data-Split
Cloning into '/var/lib/mock/f45-build-26625-618/root/chroot_tmpdir/scmroot/perl-Test-Data-Split'...
$ git fetch origin 7ec52fb11888bc490172c5883cc97a8ad019ed78:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Test-Data-Split
 * [new ref]         7ec52fb11888bc490172c5883cc97a8ad019ed78 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7ec52fb Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild