$ git clone -n https://src.fedoraproject.org/rpms/perl-Tree-XPathEngine.git /var/lib/mock/f41-build-898929-16975/root/chroot_tmpdir/scmroot/perl-Tree-XPathEngine
Cloning into '/var/lib/mock/f41-build-898929-16975/root/chroot_tmpdir/scmroot/perl-Tree-XPathEngine'...
$ git fetch origin a74dd48a4756d2e684e94af6c9ec7d6de1a0569a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Tree-XPathEngine
 * [new ref]         a74dd48a4756d2e684e94af6c9ec7d6de1a0569a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a74dd48 Eliminate use of obsolete %patchN syntax (#2283636)