$ git clone -n https://src.fedoraproject.org/rpms/libcbor.git /var/lib/mock/f40-build-2067890-49291/root/chroot_tmpdir/scmroot/libcbor
Cloning into '/var/lib/mock/f40-build-2067890-49291/root/chroot_tmpdir/scmroot/libcbor'...
$ git fetch origin 6ad6393f62b36933581ecb2b1a64edd81a3c5cd0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libcbor
 * [new ref]         6ad6393f62b36933581ecb2b1a64edd81a3c5cd0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6ad6393 Move devel/api manpage to devel package