$ git clone -n https://src.fedoraproject.org/rpms/ucpp.git /var/lib/mock/f41-build-side-1-2671019-29078/root/chroot_tmpdir/scmroot/ucpp
Cloning into '/var/lib/mock/f41-build-side-1-2671019-29078/root/chroot_tmpdir/scmroot/ucpp'...
$ git fetch origin 88c1b1512a802c29d404124acf3fe7b8b5c74c8f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ucpp
 * [new ref]         88c1b1512a802c29d404124acf3fe7b8b5c74c8f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 88c1b15 convert license to SPDX