$ git clone -n https://src.fedoraproject.org/rpms/perl-Future.git /var/lib/mock/f45-build-23657-598/root/chroot_tmpdir/scmroot/perl-Future
Cloning into '/var/lib/mock/f45-build-23657-598/root/chroot_tmpdir/scmroot/perl-Future'...
$ git fetch origin 4aa7133b93b5ad8ad923c287658843a88ff642d7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Future
 * [new ref]         4aa7133b93b5ad8ad923c287658843a88ff642d7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4aa7133 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild