$ git clone -n https://src.fedoraproject.org/rpms/wsjtx.git /var/lib/mock/f41-build-856548-167665/root/chroot_tmpdir/scmroot/wsjtx
Cloning into '/var/lib/mock/f41-build-856548-167665/root/chroot_tmpdir/scmroot/wsjtx'...
$ git fetch origin 1f300b23eb8e1c07a7d1b708f25c1147025f234c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/wsjtx
 * [new ref]         1f300b23eb8e1c07a7d1b708f25c1147025f234c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1f300b2 Update to 2.7.0 RC7.