$ git clone -n https://src.fedoraproject.org/rpms/perl-Crypt-RC4.git /var/lib/mock/f45-build-22649-593/root/chroot_tmpdir/scmroot/perl-Crypt-RC4
Cloning into '/var/lib/mock/f45-build-22649-593/root/chroot_tmpdir/scmroot/perl-Crypt-RC4'...
$ git fetch origin 0469ed395419c8b00f49f74f0f6468de4d5a82fb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Crypt-RC4
 * [new ref]         0469ed395419c8b00f49f74f0f6468de4d5a82fb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0469ed3 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild