$ git clone -n https://src.fedoraproject.org/rpms/perl-AnyEvent-Connector.git /var/lib/mock/f45-build-21638-587/root/chroot_tmpdir/scmroot/perl-AnyEvent-Connector
Cloning into '/var/lib/mock/f45-build-21638-587/root/chroot_tmpdir/scmroot/perl-AnyEvent-Connector'...
$ git fetch origin 12b1081c76c6528319f0a1462d0baf1a119c0c9d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-AnyEvent-Connector
 * [new ref]         12b1081c76c6528319f0a1462d0baf1a119c0c9d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 12b1081 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild