$ git clone -n https://src.fedoraproject.org/rpms/warble.git /var/lib/mock/f41-build-side-1-2778994-32451/root/chroot_tmpdir/scmroot/warble
Cloning into '/var/lib/mock/f41-build-side-1-2778994-32451/root/chroot_tmpdir/scmroot/warble'...
$ git fetch origin 66e830ef301a5390ce9301b0d1410d7788571cc7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/warble
 * [new ref]         66e830ef301a5390ce9301b0d1410d7788571cc7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 66e830e convert GPLv3+ license to SPDX