$ git clone -n https://src.fedoraproject.org/rpms/perl-RPC-XML.git /var/lib/mock/f45-build-25991-614/root/chroot_tmpdir/scmroot/perl-RPC-XML
Cloning into '/var/lib/mock/f45-build-25991-614/root/chroot_tmpdir/scmroot/perl-RPC-XML'...
$ git fetch origin 810b8187e2cbe690825f9c6a02cf6790471322e2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-RPC-XML
 * [new ref]         810b8187e2cbe690825f9c6a02cf6790471322e2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 810b818 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild