$ git clone -n https://src.fedoraproject.org/rpms/perl-Command-Runner.git /var/lib/mock/f45-build-22431-591/root/chroot_tmpdir/scmroot/perl-Command-Runner
Cloning into '/var/lib/mock/f45-build-22431-591/root/chroot_tmpdir/scmroot/perl-Command-Runner'...
$ git fetch origin 7e13787a654169626d28649687f6b2aa63f1e99f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Command-Runner
 * [new ref]         7e13787a654169626d28649687f6b2aa63f1e99f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7e13787 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild