$ git clone -n https://src.fedoraproject.org/rpms/dyninst.git /var/lib/mock/f42-build-3409141-45146/root/chroot_tmpdir/scmroot/dyninst
Cloning into '/var/lib/mock/f42-build-3409141-45146/root/chroot_tmpdir/scmroot/dyninst'...
$ git fetch origin 75a479c9cc41f00bf632fee3cfae9f5a97a9bd0a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dyninst
 * [new ref]         75a479c9cc41f00bf632fee3cfae9f5a97a9bd0a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 75a479c Backport https://github.com/dyninst/dyninst/issues/1730 for ctor ordering