$ git clone -n https://src.fedoraproject.org/rpms/arts.git /var/lib/mock/f41-build-755868-13415/root/chroot_tmpdir/scmroot/arts
Cloning into '/var/lib/mock/f41-build-755868-13415/root/chroot_tmpdir/scmroot/arts'...
$ git fetch origin bcd1cc2a9e805d2d41636bf2b917be0aa1081f35:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/arts
 * [new ref]         bcd1cc2a9e805d2d41636bf2b917be0aa1081f35 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bcd1cc2 Eliminate use of obsolete %patchN syntax (#2283636)