$ git clone -n https://src.fedoraproject.org/rpms/valgrind.git /var/lib/mock/f41-build-side-1-3135067-39766/root/chroot_tmpdir/scmroot/valgrind
Cloning into '/var/lib/mock/f41-build-side-1-3135067-39766/root/chroot_tmpdir/scmroot/valgrind'...
$ git fetch origin 614cc2fa056c72ea141f91ce36d0b1632c9f23dd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/valgrind
 * [new ref]         614cc2fa056c72ea141f91ce36d0b1632c9f23dd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 614cc2f 3.24.0-1 - Upstream 3.24.0 final