$ git clone -n https://src.fedoraproject.org/rpms/InsightToolkit.git /var/lib/mock/f38-build-side-42-init-devel-1338247-30694/root/chroot_tmpdir/scmroot/InsightToolkit
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1338247-30694/root/chroot_tmpdir/scmroot/InsightToolkit'...
$ git fetch origin 72c8941d9d22cb9737a73c699e97c2ad3907f0f2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/InsightToolkit
 * [new ref]         72c8941d9d22cb9737a73c699e97c2ad3907f0f2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 72c8941 Bump to -std=gnu++14 for gtest compat