$ git clone -n https://src.fedoraproject.org/rpms/ntp-refclock.git /var/lib/mock/f41-build-772712-13507/root/chroot_tmpdir/scmroot/ntp-refclock
Cloning into '/var/lib/mock/f41-build-772712-13507/root/chroot_tmpdir/scmroot/ntp-refclock'...
$ git fetch origin 47220a1f207d36deb953b553a8eb8a4b7abac2dc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ntp-refclock
 * [new ref]         47220a1f207d36deb953b553a8eb8a4b7abac2dc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 47220a1 Eliminate use of obsolete %patchN syntax (#2283636)