$ git clone -n https://src.fedoraproject.org/rpms/perl-AnyEvent-XMPP.git /var/lib/mock/f41-build-787139-13594/root/chroot_tmpdir/scmroot/perl-AnyEvent-XMPP
Cloning into '/var/lib/mock/f41-build-787139-13594/root/chroot_tmpdir/scmroot/perl-AnyEvent-XMPP'...
$ git fetch origin 7807ac50e81b5fd6231b62723e281da24019fbd5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-AnyEvent-XMPP
 * [new ref]         7807ac50e81b5fd6231b62723e281da24019fbd5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7807ac5 Eliminate use of obsolete %patchN syntax (#2283636)