$ git clone -n https://src.fedoraproject.org/rpms/fldigi.git /var/lib/mock/f39-build-1579369-38021/root/chroot_tmpdir/scmroot/fldigi
Cloning into '/var/lib/mock/f39-build-1579369-38021/root/chroot_tmpdir/scmroot/fldigi'...
$ git fetch origin 9df7cede85e69f086398f80f054842c6027a17aa:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fldigi
 * [new ref]         9df7cede85e69f086398f80f054842c6027a17aa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9df7ced Update to 4.2.00.