$ git clone -n https://src.fedoraproject.org/rpms/xcfun.git /var/lib/mock/f41-build-755463-13413/root/chroot_tmpdir/scmroot/xcfun
Cloning into '/var/lib/mock/f41-build-755463-13413/root/chroot_tmpdir/scmroot/xcfun'...
$ git fetch origin 02c69a646138caf9832dd21e1bf7be88ef67ce9c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xcfun
 * [new ref]         02c69a646138caf9832dd21e1bf7be88ef67ce9c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 02c69a6 Eliminate use of obsolete %patchN syntax (#2283636)