$ git clone -n https://src.fedoraproject.org/rpms/perl-Alien-ProtoBuf.git /var/lib/mock/f45-build-21613-587/root/chroot_tmpdir/scmroot/perl-Alien-ProtoBuf
Cloning into '/var/lib/mock/f45-build-21613-587/root/chroot_tmpdir/scmroot/perl-Alien-ProtoBuf'...
$ git fetch origin 5e6bd82aefca2c34bd79dbeec157bf8776bfa133:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Alien-ProtoBuf
 * [new ref]         5e6bd82aefca2c34bd79dbeec157bf8776bfa133 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5e6bd82 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild