$ git clone -n https://src.fedoraproject.org/rpms/rocrand.git /var/lib/mock/f39-build-2110368-50654/root/chroot_tmpdir/scmroot/rocrand
Cloning into '/var/lib/mock/f39-build-2110368-50654/root/chroot_tmpdir/scmroot/rocrand'...
$ git fetch origin f3f67825090fc6b040c7122a761b106a8cddb976:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rocrand
 * [new ref]         f3f67825090fc6b040c7122a761b106a8cddb976 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f3f6782 Update to 5.7.1