$ git clone -n https://src.fedoraproject.org/rpms/libdnf-plugin-txnupd.git /var/lib/mock/f41-build-side-1-2751711-31120/root/chroot_tmpdir/scmroot/libdnf-plugin-txnupd
Cloning into '/var/lib/mock/f41-build-side-1-2751711-31120/root/chroot_tmpdir/scmroot/libdnf-plugin-txnupd'...
$ git fetch origin 949360b78d7a2e4b233540188252071ad3e74ee0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libdnf-plugin-txnupd
 * [new ref]         949360b78d7a2e4b233540188252071ad3e74ee0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 949360b convert license to SPDX