$ git clone -n https://src.fedoraproject.org/rpms/udpxy.git /var/lib/mock/f41-build-side-1-2671068-29079/root/chroot_tmpdir/scmroot/udpxy
Cloning into '/var/lib/mock/f41-build-side-1-2671068-29079/root/chroot_tmpdir/scmroot/udpxy'...
$ git fetch origin fc40c3a4b6ef2d1acc41ef08daaa6807fa1a8f72:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/udpxy
 * [new ref]         fc40c3a4b6ef2d1acc41ef08daaa6807fa1a8f72 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fc40c3a convert GPLv3+ license to SPDX