$ git clone -n https://src.fedoraproject.org/rpms/dvd+rw-tools.git /var/lib/mock/f41-build-1018519-17947/root/chroot_tmpdir/scmroot/dvd+rw-tools
Cloning into '/var/lib/mock/f41-build-1018519-17947/root/chroot_tmpdir/scmroot/dvd+rw-tools'...
$ git fetch origin febbe88775132d6afcb60c42e280b6f11631071a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dvd+rw-tools
 * [new ref]         febbe88775132d6afcb60c42e280b6f11631071a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at febbe88 Eliminate use of obsolete %patchN syntax (#2283636)