$ git clone -n https://src.fedoraproject.org/rpms/perl-Devel-Autoflush.git /var/lib/mock/f45-build-23061-595/root/chroot_tmpdir/scmroot/perl-Devel-Autoflush
Cloning into '/var/lib/mock/f45-build-23061-595/root/chroot_tmpdir/scmroot/perl-Devel-Autoflush'...
$ git fetch origin bc971f468fbdffc3bbc8789cbcfd2953eda4e000:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Devel-Autoflush
 * [new ref]         bc971f468fbdffc3bbc8789cbcfd2953eda4e000 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bc971f4 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild