$ git clone -n https://src.fedoraproject.org/rpms/tdom.git /var/lib/mock/f41-build-1041918-18994/root/chroot_tmpdir/scmroot/tdom
Cloning into '/var/lib/mock/f41-build-1041918-18994/root/chroot_tmpdir/scmroot/tdom'...
$ git fetch origin ebc7189bde5e0ebf903bcc7abbc1661a2a6bd8cf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/tdom
 * [new ref]         ebc7189bde5e0ebf903bcc7abbc1661a2a6bd8cf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ebc7189 Eliminate use of obsolete %patchN syntax (#2283636)