$ git clone -n https://src.fedoraproject.org/rpms/sdrpp.git /var/lib/mock/f39-build-2232001-53311/root/chroot_tmpdir/scmroot/sdrpp
Cloning into '/var/lib/mock/f39-build-2232001-53311/root/chroot_tmpdir/scmroot/sdrpp'...
$ git fetch origin f6cd95d687d459e3b40de07ff8526e7bd24c080c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/sdrpp
 * [new ref]         f6cd95d687d459e3b40de07ff8526e7bd24c080c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f6cd95d Rebuild for codec2.