$ git clone -n https://src.fedoraproject.org/rpms/mythes-en.git /var/lib/mock/f41-build-772619-13506/root/chroot_tmpdir/scmroot/mythes-en
Cloning into '/var/lib/mock/f41-build-772619-13506/root/chroot_tmpdir/scmroot/mythes-en'...
$ git fetch origin e81b46a3bc1b4d6d6382a9bc25dac066f2f75722:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mythes-en
 * [new ref]         e81b46a3bc1b4d6d6382a9bc25dac066f2f75722 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e81b46a Eliminate use of obsolete %patchN syntax (#2283636)